Four-component synthesis of 3-aminomethylated imidazoheterocycles in EtOH under catalyst-free, oxidant-free and mild conditions

Qing-Wen Gui, Bin-Bin Wang, Sha Zhu, Fu-Long Li, Meng-Xue Zhu, Min Yi, Jia-Ling Yu, Zhi-Lin Wu and Wei-Min He

Green Chem., 2021, 23, 4430
DOI: 10.1039/D1GC01017D

Visible light induced tetramethylethylenediamine assisted formylation of imidazopyridines

Golam Kibriya, Avik K. Bagdi and Alakananda Hajra

Org. Biomol. Chem., 2018, 16, 3473
DOI: 10.1039/C8OB00532J

100% atom-economical and highly regio- and stereoselective iodosulfenylation of alkynes: a reagentless and sustainable approach to access (E)-β-iodoalkenyl sulfides and (Z)-tamoxifen

Appanapalli N. V. Satyanarayana, Nilanjana Mukherjee and Tanmay Chatterjee

Green Chem., 2023, 25, 779
DOI: 10.1039/D2GC04101D

Rose Bengal catalysed photo-induced selenylation of indoles, imidazoles and arenes: a metal free approach

Sumbal Saba, Jamal Rafique, Marcelo S. Franco, Alex R. Schneider, Leandro Espíndola, Dagoberto O. Silva and Antonio L. Braga

Org. Biomol. Chem., 2018, 16, 880
DOI: 10.1039/C7OB03177G

Transition metal-free C-3 functionalization of quinoxalin-2(1H)-ones: recent advances and sanguine future

Kiran, Payal Rani, Sandhya Chahal, Jayant Sindhu, Sudhir Kumar, Rajender S. Varma and Rajvir Singh

New J. Chem., 2021, 45, 18722
DOI: 10.1039/D1NJ03445F

Iodine-catalyzed sulfuration of isoquinolin-1(2H)-ones applying ethyl sulfinates

Yangxiu Mu, Minghua Yang, Fengxia Li, Zafar Iqbal, Rui Jiang, Jing Hou, Xin Guo, Zhixiang Yang and Dong Tang

New J. Chem., 2021, 45, 4934
DOI: 10.1039/D1NJ00390A

Catalytic asymmetric oxidative sulfenylation of β-ketocarbonyls using a chiral primary amine

Qi Zhang, Mingying Shi, Xueling Mi and Sanzhong Luo

Org. Chem. Front., 2022, 9, 1276
DOI: 10.1039/D1QO01748A

Iodine-promoted radical alkyl sulfuration of imidazopyridines with dialkyl azo compounds and elemental sulfur

Yong-Chao Gao, Zhuo-Bin Huang, Li Xu, Zhao-Dong Li, Zhi-Sheng Lai and Ri-Yuan Tang

Org. Biomol. Chem., 2019, 17, 2279
DOI: 10.1039/C8OB03191F

Metal-free electrochemical C3-sulfonylation of imidazo[1,2-a]pyridines

Jingyun Zhu, Ziyue Chen, Meng He, Daoxin Wang, Liangsen Li, Junchao Qi, Renyi Shi and Aiwen Lei

Org. Chem. Front., 2021, 8, 3815
DOI: 10.1039/D1QO00348H

Functionalization of imidazo[1,2-a]pyridinesviaradical reactions

Chun-Hua Ma, Ming Chen, Zhi-Wen Feng, Yan Zhang, Jin Wang, Yu-Qin Jiang and Bing Yu

New J. Chem., 2021, 45, 9302
DOI: 10.1039/D1NJ00704A

Visible light-mediated organophotocatalyzed C–H bond functionalization reactions

Mustafa Uygur and Olga García Mancheño

Org. Biomol. Chem., 2019, 17, 5475
DOI: 10.1039/C9OB00834A

Photocatalyst-, metal- and additive-free regioselective radical cascade sulfonylation/cyclization of benzimidazole derivatives with sulfonyl chlorides induced by visible light

Bin Sun, Hai-Xia Tian, Zhi-Gang Ni, Pan-Yi Huang, Hao Ding, Bing-Qian Li, Can Jin, Chun-Lei Wu and Run-Pu Shen

Org. Chem. Front., 2022, 9, 3669
DOI: 10.1039/D2QO00518B

Transition-metal-free KI-catalyzed regioselective sulfenylation of 4-anilinocoumarins using Bunte salts

Guoqing Li, Guomeng Zhang, Xuewu Deng, Kunyu Qu, Hua Wang, Wei Wei and Daoshan Yang

Org. Biomol. Chem., 2018, 16, 8015
DOI: 10.1039/C8OB02268B

Synergistic cooperative effect of CF3SO2Na and bis(2-butoxyethyl)ether towards selective oxygenation of sulfides with molecular oxygen under visible-light irradiation

Kai-Jian Liu, Zheng Wang, Ling-Hui Lu, Jin-Yang Chen, Fei Zeng, Ying-Wu Lin, Zhong Cao, Xianyong Yu and Wei-Min He

Green Chem., 2021, 23, 496
DOI: 10.1039/D0GC02663H

Peroxide-mediated site-specific C–H methylation of imidazo[1,2-a]pyridines and quinoxalin-2(1H)-ones under metal-free conditions

Shengzhou Jin, Hua Yao, Sen Lin, Xiaoqing You, Yao Yang and Zhaohua Yan

Org. Biomol. Chem., 2020, 18, 205
DOI: 10.1039/C9OB02328C

Metal- and photocatalyst-free visible-light-promoted regioselective selenylation of coumarin derivatives via oxidation-induced C–H functionalization

Daoshan Yang, Guoqing Li, Chengyu Xing, Wenwen Cui, Kexin Li and Wei Wei

Org. Chem. Front., 2018, 5, 2974
DOI: 10.1039/C8QO00899J

Oxidative sulfonamidomethylation of imidazopyridines utilizing methanol as the main C1 source

Xue-Mei Zhao, En-Ling Huang, Yu-Shen Zhu, Jing Li, Bing Song, Xinju Zhu and Xin-Qi Hao

Org. Biomol. Chem., 2019, 17, 4869
DOI: 10.1039/C9OB00596J

Electrochemical-induced regioselective C-3 thiomethylation of imidazopyridines via a three-component cross-coupling strategy

Jiangwei Wen, Cong Niu, Kelu Yan, Xingda Cheng, Ruike Gong, Mengqian Li, Yongqiang Guo, Jianjing Yang and Hua Wang

Green Chem., 2020, 22, 1129
DOI: 10.1039/C9GC04068D

Visible light promoted C–H functionalization of imidazoheterocycles

Avik Kumar Bagdi and Alakananda Hajra

Org. Biomol. Chem., 2020, 18, 2611
DOI: 10.1039/D0OB00246A

Visible-light-promoted phosphine-mediated synthesis of thioesters and thioalkynes from sodium arylsulfinates

Sen Chen, Yu Yu and Min Chen

Org. Biomol. Chem., 2025, 23, 5174
DOI: 10.1039/D5OB00453E

Selective oxidative β-C–H bond sulfenylation of tetrahydroisoquinolines with elemental sulfur

Tao Guo, Lei Bi, Lu Shen, Quanhong Wei, Congjun Zhu, Panke Zhang and Yunhui Zhao

Org. Biomol. Chem., 2023, 21, 127
DOI: 10.1039/D2OB01976K

Recent advances in photocatalytic C–S/P–S bond formation via the generation of sulfur centered radicals and functionalization

Wei Guo, Kailiang Tao, Wen Tan, Mingming Zhao, Lvyin Zheng and Xiaolin Fan

Org. Chem. Front., 2019, 6, 2048
DOI: 10.1039/C8QO01353E

Recent advances in transition-metal-free trifluoromethylation with Togni's reagents

Jin-Yang Chen, Jing Huang, Kai Sun and Wei-Min He

Org. Chem. Front., 2022, 9, 1152
DOI: 10.1039/D1QO01504D

Catalyst and additive-free oxidative dual C–H sulfenylation of imidazoheterocycles with elemental sulfur using DMSO as a solvent and an oxidant

Tao Guo, Xu-Ning Wei, Miao Zhang, Yu Liu, Li-Min Zhu and Yun-Hui Zhao

Chem. Commun., 2020, 56, 5751
DOI: 10.1039/D0CC00043D

Visible-light-induced regioselective sulfenylation of imidazopyridines with thiols under transition metal-free conditions

Rajjakfur Rahaman, Shivasish Das and Pranjit Barman

Green Chem., 2018, 20, 141
DOI: 10.1039/C7GC02906C

Frontiers in bond construction: innovative approaches to C–C and carbon–heteroatom (C–S, C–N, C–O, C–Se, C–P) transformations-a review

Aminul Islam and Pranab Ghosh

RSC Adv., 2025, 15, 23704
DOI: 10.1039/D5RA03124A

6π-Electrocyclization in water: microwave-assisted synthesis of polyheterocyclic-fused quinoline-2-thiones

Xiao-Yun Li, Yan Liu, Xiao-Lan Chen, Xin-Yuan Lu, Xing-Xing Liang, Shan-Shan Zhu, Chuan-Wan Wei, Ling-Bo Qu and Bing Yu

Green Chem., 2020, 22, 4445
DOI: 10.1039/C9GC04445K

Photocatalyst-free decarboxylative aminoalkylation of imidazo[1,2-a]pyridines with N-aryl glycines enabled by visible light

Jiu-Jian Ji, Zhi-Qiang Zhu, Li-Jin Xiao, Dong Guo, Xiao Zhu, Juan Tang, Jun Wu, Zong-Bo Xie and Zhang-Gao Le

Org. Chem. Front., 2019, 6, 3693
DOI: 10.1039/C9QO00935C

Visible-light-promoted oxidative desulphurisation: a strategy for the preparation of unsymmetrical ureas from isothiocyanates and amines using molecular oxygen

Ziyu Gan, Guoqing Li, Qiuli Yan, Weiseng Deng, Yuan-Ye Jiang and Daoshan Yang

Green Chem., 2020, 22, 2956
DOI: 10.1039/D0GC00070A

Exogenous-oxidant-free electrochemical oxidative C–H sulfonylation of arenes/heteroarenes with hydrogen evolution

Yong Yuan, Yi Yu, Jin Qiao, Pan Liu, Banying Yu, Wukun Zhang, Huilin Liu, Min He, Zhiliang Huang and Aiwen Lei

Chem. Commun., 2018, 54, 11471
DOI: 10.1039/C8CC06451B

Visible light-induced photocatalytic C–H ethoxycarbonylmethylation of imidazoheterocycles with ethyl diazoacetate

Suvam Bhattacharjee, Sudip Laru, Sadhanendu Samanta, Mukta Singsardar and Alakananda Hajra

RSC Adv., 2020, 10, 27984
DOI: 10.1039/D0RA05795A

Electrochemical oxidative C–H/N–H cross-coupling for C–N bond formation with hydrogen evolution

Yi Yu, Yong Yuan, Huilin Liu, Min He, Mingzhu Yang, Pan Liu, Banying Yu, Xuanchi Dong and Aiwen Lei

Chem. Commun., 2019, 55, 1809
DOI: 10.1039/C8CC09899A

π‐conjugated chromophore functionalized high‐nuclearity titanium‐oxo clusters containing structural unit of anatase for photocatalytic selective oxidation of sulfides

Ling‐Rong Liao, Dong‐Chun Zheng, Pin‐Xi Ou, Qi‐Xin Zhao, Wei‐Min Xuan and Qi Zheng

Rare Metals, 2024, 43, 1736
DOI: 10.1007/s12598-023-02545-0

Organophotoredox‐Catalyzed Late‐Stage Functionalization of Heterocycles

Sudhir Kumar Hota, Dilsha Jinan, Satya Prakash Panda, Rittwika Pan, Basudev Sahoo and Sandip Murarka

Asian J Org Chem, 2021, 10, 1848
DOI: 10.1002/ajoc.202100234

Rational synthetic methods in creating promising (hetero)aromatic molecules and materials

Grigory V. Zyryanov, Dmitry S. Kopchuk, Igor S. Kovalev, Sougata Santra, Matiur Rahman, Albert F. Khasanov, Alexey P. Krinochkin, Olga S. Taniya, Oleg N. Chupakhin and Valery N. Charushin

Mendeleev Communications, 2020, 30, 537
DOI: 10.1016/j.mencom.2020.09.001

Multicomponent Synthesis of Imidazo[1,2-a]pyridines: Aerobic Oxidative Formation of C–N and C–S Bonds by Flavin–Iodine-Coupled Organocatalysis

Hayaki Okai, Kazumasa Tanimoto, Ryoma Ohkado and Hiroki Iida

Org. Lett., 2020, 22, 8002
DOI: 10.1021/acs.orglett.0c02929

Visible Light‐Induced Energy Transfer Mediated Regioselective C‐3 Thiolation of Imidazoheterocycles using Bunte Salts

Sehdev Kumar, Anoop Sharma, Raman Kumar and Anuj Sharma

Chemistry An Asian Journal, 2025, 20
DOI: 10.1002/asia.202401875

Application on the Construction of Imidazo[1,2-a]pyridines C-3 Canbon-Hetero Bonds by Visible-Light Catalysis and Electrochemistry

Xiang Liu, Wen Li, Huanyu Liu and Hua Cao

Chinese Journal of Organic Chemistry, 2021, 1759
DOI: 10.6023/cjoc202012026

Iodine‐Promoted Tandem Pyrazole Annulation and C−H Sulfenylation for the Synthesis of C4‐Sulfenylated Pyrazoles

Yijiao Feng, Jing He, Yueting Wei, Jianwei Xie and Ping Liu

Eur J Org Chem, 2022, 2022
DOI: 10.1002/ejoc.202200357

Visible-Light-Driven Denitrogenative C–C Bond Formation and Oxidative Difunctionalization of Vinyl Azides

Santosh Sing Sardar, Aramita De, Satyajit Pal, Subhankar Sarkar, Sougata Santra, Grigory V. Zyryanov and Adinath Majee

Synlett, 2024, 35, 291
DOI: 10.1055/a-2131-3208

Iodine/DMSO-Promoted Selective Direct Arylthiation of Anilines with Thiols under Metal-Free Conditions

Wenqi Zhao, Feng Zhang and Guo-Jun Deng

J. Org. Chem., 2021, 86, 291
DOI: 10.1021/acs.joc.0c02078

Visible-Light-Induced Regioselective Cross-Dehydrogenative Coupling of 2H-Indazoles with Ethers

Mukta Singsardar, Sudip Laru, Susmita Mondal and Alakananda Hajra

J. Org. Chem., 2019, 84, 4543
DOI: 10.1021/acs.joc.9b00318

Metal‐Free Four‐Component Strategy to Access Thioether‐Derived Imidazo[1,2‐a]pyridines and Imidazo[2,1‐b]thiazoles

Arram Haritha Kumari, Shreya Ghosh, Naveena S. Veeranagaiah, Raghavaiah Pallepogu and Raju Jannapu Reddy

Eur J Org Chem, 2025, 28
DOI: 10.1002/ejoc.202500394

Visible-Light-Induced Regioselective C(sp3)-H Acyloxylation of Aryl-2H-azirines with (Diacetoxy)iodobenzene

Aramita De, Sougata Santra, Alakananda Hajra, Grigory V. Zyryanov and Adinath Majee

J. Org. Chem., 2019, 84, 11735
DOI: 10.1021/acs.joc.9b01625

Direct C–H bond sulfenylation of (Het)arenes using sulfonyl hydrazides as thiol surrogate: a review

Akram Hosseinian, Sattar Arshadi, Shahriar Sarhandi, Aazam Monfared and Esmail Vessally

Journal of Sulfur Chemistry, 2019, 40, 289
DOI: 10.1080/17415993.2019.1582654

Metal‐, Oxidant‐, and Additive‐Free Sulfenylation of Imidazo[1,2‐a]pyridines Using Sulfenamides and an I2 Catalyst

Huijie Qiao, Kun Zhao, Xilin Zhu, Xiaoxu Xu, Chunyang Wang, Lulu Zhong, Shixing Wang, Liting Yang, Dehong Yang, Guoqun Liu, Chunlei Lin and Mingli Jiao

Asian J Org Chem, 2023, 12
DOI: 10.1002/ajoc.202300292

Intermolecular [2+2] photocycloaddition of chalcones with 2,3-dimethyl-1,3-butadiene under neat reaction conditions

Fang Tang, Li Tang, Zhi Guan and Yan-Hong He

Tetrahedron, 2018, 74, 6694
DOI: 10.1016/j.tet.2018.09.060

Recent Developments in the Photochemical Synthesis of Functionalized Imidazopyridines

Christine Tran and Abdallah Hamze

Molecules, 2022, 27, 3461
DOI: 10.3390/molecules27113461

Visible-Light-Induced Dehydrogenative Imidoylation of Imidazo[1,2-a]pyridines with α-Amino Acid Derivatives and α-Amino Ketones

Zhi-Qiang Zhu, Dong Guo, Jiu-Jian Ji, Xiao Zhu, Juan Tang, Zong-Bo Xie and Zhang-Gao Le

J. Org. Chem., 2020, 85, 15062
DOI: 10.1021/acs.joc.0c01940

Applications of organocatalysed visible-light photoredox reactions for medicinal chemistry

Michael K Bogdos, Emmanuel Pinard and John A Murphy

Beilstein J. Org. Chem., 2018, 14, 2035
DOI: 10.3762/bjoc.14.179

One Pot Synthesis of C3-Sulfurized Imidazolo [1,2-a] Pyridines

Ya-Dan Zhang, Zhi-Peng Guan and Zhi-Bing Dong

J. Org. Chem., 2024, 89, 14098
DOI: 10.1021/acs.joc.4c01524

Recent Advances in Radical C−H Bond Functionalization of Imidazoheterocycles

Om P. S. Patel, Nitesh K. Nandwana, Lesetja J. Legoabe, Bhaskar C. Das and Anil Kumar

Adv Synth Catal, 2020, 362, 4226
DOI: 10.1002/adsc.202000633

Visible-Light-Induced Decarboxylation of Dioxazolones to Phosphinimidic Amides and Ureas

Jie Pan, Haocong Li, Kai Sun, Shi Tang and Bing Yu

Molecules, 2022, 27, 3648
DOI: 10.3390/molecules27123648

Iodine(III) Enabled Dehydrogenative Aryl C−S Coupling by in situ Generated Sulfenium Ion

Khokan Choudhuri, Saikat Maiti and Prasenjit Mal

Adv Synth Catal, 2019, 361, 1092
DOI: 10.1002/adsc.201801510

Three‐Component C–H Bond Sulfonylation of Imidazoheterocycles by Visible‐Light Organophotoredox Catalysis

Chloé Breton‐Patient, Delphine Naud‐Martin, Florence Mahuteau‐Betzer and Sandrine Piguel

Eur J Org Chem, 2020, 2020, 6653
DOI: 10.1002/ejoc.202001219

An Efficient Sequential One‐Pot Approach for the Synthesis of C3‐Functionalized Imidazo[1,2‐a]pyridines under Transition‐Metal Free Conditions

Raju Jannapu Reddy, Angothu Shankar and Arram Haritha Kumari

Asian J Org Chem, 2019, 8, 2269
DOI: 10.1002/ajoc.201900606

Syntheses and Transformations of Sulfinamides

Qiaoling Zhang, Jufang Xi, He Ze and Zeng Qingle

Synthesis, 2021, 53, 2570
DOI: 10.1055/a-1426-4744

Pushing Boundaries: What’s Next in Metal-Free C–H Functionalization for Sulfenylation?

Payal Rani, Sandhya Chahal, Rajvir Singh and Jayant Sindhu

Top Curr Chem (Z), 2024, 382
DOI: 10.1007/s41061-024-00460-1

Visible Light‐Mediated C2‐Quaternarization of N‐Alkyl Indoles through Oxidative Dearomatization using Ir(III) Catalyst

Gaurav Shukla, Anjali Dahiya, Tipu Alam and Bhisma K. Patel

Asian J Org Chem, 2019, 8, 2243
DOI: 10.1002/ajoc.201900604

Visible Light Organic Photoredox-Catalyzed C–H Alkoxylation of Imidazopyridine with Alcohol

Golam Kibriya, Sadhanendu Samanta, Sourav Jana, Susmita Mondal and Alakananda Hajra

J. Org. Chem., 2017, 82, 13722
DOI: 10.1021/acs.joc.7b02582

Copper‐Catalyzed Three‐Component Sulfenylation of Imidazopyridines with Ethyl Potassium Xanthogenate and Aryl Halides

Minghua Yang, Yating Shao, Jing Chen, Xiangfei Chen and Yadong Li

ChemistrySelect, 2026, 11
DOI: 10.1002/slct.202505244

Environment-Friendly Protocol for the Chlorination of Imidazoheterocycles by Chloramine-T

Amrita Dey, Mukta Singsardar, Rajib Sarkar and Alakananda Hajra

ACS Omega, 2018, 3, 3513
DOI: 10.1021/acsomega.7b01844

Highly Efficient and Eco‐Benign Synthesis of 3‐Imidazoheterocyclic‐Substituted Phthalides/Isoindolinones in Water under Catalyst‐ and Additive‐Free Conditions

Tao Guo, Hui‐Jie Wang, Can‐Can Cao, Kuo‐Hong Chen, Yu Liu, Pan‐Ke Zhang, Yun‐Hui Zhao and Yong‐Cheng Ma

Eur J Org Chem, 2020, 2020, 3613
DOI: 10.1002/ejoc.202000308

Photoredox-Catalyzed C–H Functionalization Reactions

Natalie Holmberg-Douglas and David A. Nicewicz

Chem. Rev., 2022, 122, 1925
DOI: 10.1021/acs.chemrev.1c00311

Organic Sulfinic Acids and Salts in Visible Light-Induced Reactions

Zheng Lu, Mingzhou Shang and Hongjian Lu

Synthesis, 2022, 54, 1231
DOI: 10.1055/a-1671-0085

Iodine and DMSO as Surrogate of Hazardous Metal and Non‐Metal Reagents in Organic Synthesis

Reetu Reetu, Sangita Kalita, Sonali Dash and Chandi C. Malakar

ChemistrySelect, 2024, 9
DOI: 10.1002/slct.202303845

Electrochemical Oxidative C—H Sulfenylation of Imidazopyridines with Hydrogen Evolution

Yong Yuan, Yangmin Cao, Jin Qiao, Yueping Lin, Xiaomei Jiang, Yaqing Weng, Shan Tang and Aiwen Lei

Chin. J. Chem., 2019, 37, 49
DOI: 10.1002/cjoc.201800405

Visible‐Light Cercosporin Catalyzed Sulfenylation of Electron‐Rich Compounds with Thiols under Transition‐Metal‐Free Conditions

Sukanya Hazarika and Pranjit Barman

ChemistrySelect, 2020, 5, 11583
DOI: 10.1002/slct.202002512

Synthesis of C3-Cyanomethylated Imidazo[1,2-a]pyridines via Ultrasound-Promoted Three-Component Reaction under Catalyst- and Oxidant-Free Conditions

Jie Zhang, Yufeng Zhang, Jian Zhang, Qingguo Wu and Haifeng Yang

Synlett, 2022, 33, 264
DOI: 10.1055/a-1704-4822

A Retrosynthetic Approach for Photocatalysis

Daniel Petzold, Maciej Giedyk, Anamitra Chatterjee and Burkhard König

Eur J Org Chem, 2020, 2020, 1193
DOI: 10.1002/ejoc.201901421

Sulfinic Acids in Organic Synthesis: A Review of Recent Studies

Ruwei Bao, Yanping Feng, Danfeng Deng, Dayun Huang and Xiangyu Sun

Asian J Org Chem, 2021, 10, 1884
DOI: 10.1002/ajoc.202100331

CH‐Functionalization of Heterocycles with the Formation of C−O, C−N, C−S/Se, and C−P Bonds by Intermolecular Addition of Heteroatom‐Centered Radicals

Alexander S. Budnikov, Igor B. Krylov, Olga M. Mulina, Dmitry A. Lapshin and Alexander O. Terent'ev

Adv Synth Catal, 2023, 365, 1714
DOI: 10.1002/adsc.202300144

Dehydrogenative Aromatization and Sulfonylation of Pyrrolidines: Orthogonal Reactivity in Photoredox Catalysis

Krishnamoorthy Muralirajan, Rajesh Kancherla and Magnus Rueping

Angewandte Chemie, 2018, 130, 15003
DOI: 10.1002/ange.201808427

Dehydrogenative Aromatization and Sulfonylation of Pyrrolidines: Orthogonal Reactivity in Photoredox Catalysis

Krishnamoorthy Muralirajan, Rajesh Kancherla and Magnus Rueping

Angew Chem Int Ed, 2018, 57, 14787
DOI: 10.1002/anie.201808427

Modulation of photochemical oxidation of thioethers to sulfoxides or sulfones using an aromatic ketone as the photocatalyst

Bin Zhao, Gerald B. Hammond and Bo Xu

Tetrahedron Letters, 2021, 82, 153376
DOI: 10.1016/j.tetlet.2021.153376

Transition Metal‐Free Sulfenylation of C−H Bonds for C−S Bond Formation in Recent Years: Mechanistic Approach and Promising Future

Mohit Saroha, Jayant Sindhu, Sudhir Kumar, Kuldip K. Bhasin, Jitender M. Khurana, Rajender S. Varma and Deepak Tomar

ChemistrySelect, 2021, 6, 13077
DOI: 10.1002/slct.202102042

Metal-Free Site-Specific Hydroxyalkylation of Imidazo[1,2-a]pyridines with Alcohols through Radical Reaction

Shengzhou Jin, Bo Xie, Sen Lin, Cong Min, Ruihong Deng and Zhaohua Yan

Org. Lett., 2019, 21, 3436
DOI: 10.1021/acs.orglett.9b01212

Copper‐Catalyzed Domino Synthesis of Sulfur‐Containing Heterocycles Using Carbon Disulfide as a Building Block

Ziyu Gan, Qiuli Yan, Guoqing Li, Qin Li, Xiaomeng Dou, Guang‐Yao Li and Daoshan Yang

Adv Synth Catal, 2019, 361, 4558
DOI: 10.1002/adsc.201900643

Effective Formation of New C(sp2)−S Bonds via Photoactivation of Alkylamine‐based Electron Donor‐Acceptor Complexes

Jorge C. Herrera‐Luna, María Carmen Pérez‐Aguilar, Leon Gerken, Olga García Mancheño, M. Consuelo Jiménez and Raúl Pérez‐Ruiz

Chemistry A European J, 2023, 29
DOI: 10.1002/chem.202203353

Photoredox-catalyzed sulfenylation/cyclization of N-aryl-N-tosylpropargylamine with disulfide: A concise route to 3-phenylthioquinoline

Yu-Zhao Wang, Heng-Rui Zhang, Li Zhou, Jun-Dan Fang and Xue-Yuan Liu

Tetrahedron, 2019, 75, 2893
DOI: 10.1016/j.tet.2019.04.017

Copper-Catalyzed Double Thiolation To Access Sulfur-Bridged Imidazopyridines with Isothiocyanate

Lu-Lu Tian, Shuai Lu, Zhe-Hua Zhang, En-Ling Huang, Hua-Ting Yan, Xinju Zhu, Xin-Qi Hao and Mao-Ping Song

J. Org. Chem., 2019, 84, 5213
DOI: 10.1021/acs.joc.9b00186

Molecular iodine enabled generation of iminyl radicals from oximes: A facile route to imidazo[1,2-a]pyridines and its regioselective C-3 sulfenylated products from simple pyridines

Deepak Singh, Soumyadeep Roy Chowdhury, Shyamal Pramanik and Soumitra Maity

Tetrahedron, 2021, 88, 132125
DOI: 10.1016/j.tet.2021.132125

Copper-catalyzed three-component reaction of imidazo[1,2-a]pyridine with elemental sulfur and arylboronic acid to produce sulfenylimidazo[1,2-a]pyridines

Genhua Xiao, Hao Min, Zhilei Zheng, Guobo Deng and Yun Liang

Chinese Chemical Letters, 2018, 29, 1363
DOI: 10.1016/j.cclet.2017.12.013

Photocatalyst-Free Regioselective C–H Thiocyanation of 4-Anilinocoumarins under Visible Light

Guoqing Li, Qiuli Yan, Xueqin Gong, Xiaomeng Dou and Daoshan Yang

ACS Sustainable Chem. Eng., 2019, 7, 14009
DOI: 10.1021/acssuschemeng.9b02511

Annulation of Ketene Dithioacetals and Sulfonyl Hydrazines for the Synthesis of N‐Sulfonyl 5‐Alkylthiopyrazoles

Yi Li, Jie‐Ping Wan and Yunyun Liu

ChemistrySelect, 2020, 5, 9431
DOI: 10.1002/slct.202002480

The sulfenylation of imidazopyridines with sulfinic acids mediated by DTBP/HCl

Yu Wang, Hongkun Huang, Xueyu Fang, Chun Ling, Tian Chen, Hua Yao and Zhaohua Yan

Results in Chemistry, 2025, 16, 102428
DOI: 10.1016/j.rechem.2025.102428

Z‐Selective Synthesis of α‐Sulfanyl Carbonyl Compounds from Internal Alkynes and Thiols via Photoredox Catalysis

Alberto Luridiana, Angelo Frongia, Mariano Andrea Scorciapino, Giuliano Malloci, Barbara Manconi, Simone Serrao, Pier Carlo Ricci and Francesco Secci

Adv Synth Catal, 2022, 364, 124
DOI: 10.1002/adsc.202100996

Visible-Light-Promoted C(sp3)–C(sp2) Cross-Dehydrogenative Coupling of Tertiary Amine with Imidazopyridine

Golam Kibriya, Avik Kumar Bagdi and Alakananda Hajra

J. Org. Chem., 2018, 83, 10619
DOI: 10.1021/acs.joc.8b01433

Recent advances in the application of sulfinic acids for the construction of sulfur-containing compounds

Yufen Lv, Huanhuan Cui, Na Meng, Huilan Yue and Wei Wei

Chinese Chemical Letters, 2022, 33, 97
DOI: 10.1016/j.cclet.2021.06.068

Metal-Free Visible-Light-Induced C–H/C–H Cross-Dehydrogenative-Coupling of Quinoxalin-2(H)-ones with Simple Ethers

Wei Wei, Leilei Wang, Huilan Yue, Pengli Bao, Weiwei Liu, Changsong Hu, Daoshan Yang and Hua Wang

ACS Sustainable Chem. Eng., 2018, 6, 17252
DOI: 10.1021/acssuschemeng.8b04652

Visible‐Light‐Promoted Synthesis of Arylthiopyrimidines through Oxidative Coupling of Pyrimidine Disulfides with Arylhydrazines

Xue‐Jun Zhao, Wen‐Peng Wang, Bo‐Sheng Zhang, Zheng‐Jun Quan and Xi‐Cun Wang

ChemistrySelect, 2022, 7
DOI: 10.1002/slct.202200910

One-Pot, Three-Component Synthesis of 5-Sulfenyl-2-iminothiazolines by Cross-Dehydrogenative C–S Coupling Using I2/DMSO in Open Air

Chandan Bodhak and Animesh Pramanik

J. Org. Chem., 2019, 84, 7265
DOI: 10.1021/acs.joc.9b00785

A Facile Synthesis of 3‐(Arylthio)imidazo[1,2‐a]pyridin‐2(3H)‐ones from 2‐Aminopyridinium Bromides and Sodium Arenesulfinates

Saroj, Krishnan Rangan and Anil Kumar

Eur J Org Chem, 2020, 2020, 7015
DOI: 10.1002/ejoc.202000996

Micellar Catalysis: Visible‐Light Mediated Imidazo[1,2‐a]pyridine C—H Amination with N‐Aminopyridinium Salt Accelerated by Surfactant in Water

Zhonglie Yang, Kun Cao, Xiaoyan Peng, Li Lin, Danchen Fan, Jun‐Long Li, Jingxia Wang, Xiaobin Zhang, Hezhong Jiang and Jiahong Li

Chin. J. Chem., 2021, 39, 3347
DOI: 10.1002/cjoc.202100489

tert-Butyl Hydroperoxide-Mediated Oxo-Sulfonylation of 2H-Indazoles with Sulfinic Acid toward Indazol-3(2H)-ones

Payel Ghosh, Susmita Mondal and Alakananda Hajra

Org. Lett., 2020, 22, 1086
DOI: 10.1021/acs.orglett.9b04617

Visible-Light-Initiated Decarboxylative Alkylation of Quinoxalin-2(1H)-ones with Phenyliodine(III) Dicarboxylates in Recyclable Ruthenium(II) Catalytic System

Long-Yong Xie, Li-Lin Jiang, Jia-Xi Tan, Yi Wang, Xiang-Qin Xu, Bo Zhang, Zhong Cao and Wei-Min He

ACS Sustainable Chem. Eng., 2019, 7, 14153
DOI: 10.1021/acssuschemeng.9b02822

Cu-catalyzed coupling of unactivated tertiary alkyl alcohols with thiols via C–O bond cleavage

Bing Xu, Yang Ye, Ying Lin, Renren Bai, Xiang-Yang Ye and Tian Xie

Tetrahedron Letters, 2022, 89, 153604
DOI: 10.1016/j.tetlet.2021.153604

Unconventional Reactivity with DABCO‐Bis(sulfur dioxide): C–H Bond Sulfenylation of Imidazopyridines

Julie Le Bescont, Chloé Breton‐Patient and Sandrine Piguel

Eur J Org Chem, 2020, 2020, 2101
DOI: 10.1002/ejoc.202000112

Four-Component Hydroxythiolation of Styrenes with Imidazopyridines and Potassium Thiocyanate

Wang Yu, Huang Hongkun, Ling Chun, Chen Tian, Yao Hua and Yan Zhaohua

Chinese Journal of Organic Chemistry, 2026, 46, 181
DOI: 10.6023/cjoc202506001

Tandem Flavin-Iodine-Catalyzed Aerobic Oxidative Sulfenylation of Imidazo[1,2-a]Pyridines with Thiols

Hiroki Iida, Ryuta Demizu and Ryoma Ohkado

J. Org. Chem., 2018, 83, 12291
DOI: 10.1021/acs.joc.8b01878

One-Pot Two-Step Strategy for Efficient Synthesis of 3-Aryl-4-(arylthio)-1H-pyrazol-5-amines Derivatives

Yijiao Feng, Jing He, Yueting Wei, Ting Tang, Chuntian Li and Ping Liu

Chinese Journal of Organic Chemistry, 2022, 42, 226
DOI: 10.6023/cjoc202107045

Catalytic Advances and Emerging Strategies for Isoquinolin‐1(2H)‐One Synthesis: Reaction Scope and Mechanistic Perspectives

Lucky Panwar, Shalini Verma, Manoj Kumar and Brijesh Rathi

Eur J Org Chem, 2025, 28
DOI: 10.1002/ejoc.202500659

Xanthenes: Novelty and Green Photocatalysis for the Formation of Carbon-carbon or Carbon-heteroatom Bond

Javier Cervantes-González, Salma E. Mora-Rodríguez, Gerardo Zepeda Vallejo, David Cruz Cruz, Miguel A. Vázquez and Selene Lagunas-Rivera

COC, 2024, 28, 1346
DOI: 10.2174/0113852728306831240516062222

Copper-Mediated C–H Amination of Imidazopyridines with N-Fluorobenzenesulfonimide

Shuai Lu, Lu-Lu Tian, Tian-Wei Cui, Yu-Shen Zhu, Xinju Zhu, Xin-Qi Hao and Mao-Ping Song

J. Org. Chem., 2018, 83, 13991
DOI: 10.1021/acs.joc.8b02348

Copper‐Catalyzed Regioselective Cleavage of C−X and C−H Bonds: A Strategy for Sulfur Dioxide Fixation

Daoshan Yang, Pengfei Sun, Wei Wei, Fengjuan Liu, Hui Zhang and Hua Wang

Chemistry A European J, 2018, 24, 4423
DOI: 10.1002/chem.201705866

Iodine-Mediated Sulfenylation of Imidazo[1,2-a]pyridines with Ethyl Arylsulfinates

Jian Sun, Yangxiu Mu, Zafar Iqbal, Jing Hou, Minghua Yang, Zhixiang Yang and Dong Tang

Synlett, 2021, 32, 1014
DOI: 10.1055/a-1396-5933

Visible-light-induced regioselective cross-dehydrogenative coupling of 2-isothiocyanatonaphthalenes with amines using molecular oxygen

Ziyu Gan, Guoqing Li, Xiaobo Yang, Qiuli Yan, Guiyun Xu, Gaoyang Li, Yuan-Ye Jiang and Daoshan Yang

Sci. China Chem., 2020, 63, 1652
DOI: 10.1007/s11426-020-9811-6

Step-economical and Metal-free One-pot Access to 2-Aryl-3-(arylthio)imidazo[1,2-a]pyridines via Neutral Ionic Liquid-mediated Cyclocondensation–Sulfenylation

Danish Equbal, Richa Singh and Arun K. Sinha

Synthesis, 2026
DOI: 10.1055/a-2799-0214

Sulfonylacetonitriles as Building Blocks in Copper‐Catalyzed Domino Reactions: An Efficient Apporach to Sulfonated Isoquinolin‐1(2H)‐ones

Xueqin Gong, Guoqing Li, Ziyu Gan, Qiuli Yan, Xiaomeng Dou and Daoshan Yang

Asian J Org Chem, 2019, 8, 1472
DOI: 10.1002/ajoc.201900382

Cerium(III) Phosphinate and Cerium(IV) Phosphostibonate Acting as Catalysts for Mild, Selective Sulfoxidation

Calvin Samuel, Tokala Navaneetha, Junaid Ali and Viswanathan Baskar

Inorg. Chem., 2025, 64, 872
DOI: 10.1021/acs.inorgchem.4c03943

Photocatalyst-Free Visible-Light-Promoted C(sp2)–S Coupling: A Strategy for the Preparation of S-Aryl Dithiocarbamates

Guoqing Li, Qiuli Yan, Ziyu Gan, Qin Li, Xiaomeng Dou and Daoshan Yang

Org. Lett., 2019, 21, 7938
DOI: 10.1021/acs.orglett.9b02921

Visible-Light-Promoted Thioetherification Reactions via Electron Donor–Acceptor Complexes between Active Esters and Sulfinates

Xiao Xu and Qin-Hua Song

J. Org. Chem., 2025, 90, 9918
DOI: 10.1021/acs.joc.5c00949

Photocatalytic alkoxy radical-mediated transformations

Jing-Jing Guo, Anhua Hu and Zhiwei Zuo

Tetrahedron Letters, 2018, 59, 2103
DOI: 10.1016/j.tetlet.2018.04.060

Visible-Light-Mediated Synthesis of Unsymmetrical Diaryl Sulfides via Oxidative Coupling of Arylhydrazine with Thiol

Golam Kibriya, Susmita Mondal and Alakananda Hajra

Org. Lett., 2018, 20, 7740
DOI: 10.1021/acs.orglett.8b03549

Temperature-Controlled Chalcogenation and Chalcogenocyanation of Imidazopyridines in Water under Transition Metal-Free Conditions

Yu-Shen Zhu, Yuting Xue, Wannian Liu, Xinju Zhu, Xin-Qi Hao and Mao-Ping Song

J. Org. Chem., 2020, 85, 9106
DOI: 10.1021/acs.joc.0c01035

Recent Advances in Visible Light-Induced C-H Functionalization of Imidazo[1,2-a]pyridines

Juanjuan Gao, Xinlei Fu, Kai Yang and Zhaowen Liu

Molecules, 2025, 30, 607
DOI: 10.3390/molecules30030607

Synthesis of asymmetrical thioethers with sulfinamides as the sulfenylation agent under metal-free conditions

Long-jun Ma, Guang-xun Li, Jin Huang, Jin Zhu and Zhuo Tang

Tetrahedron Letters, 2018, 59, 4255
DOI: 10.1016/j.tetlet.2018.10.038

Electrosynthesis of Tetrasubstituted Sulfonated Pyrazoles through Iodide‐Mediated Multicomponent Coupling

Kingshuk Mahanty, Sayan Ghosh, Abhishek Dubey and Suman De Sarkar

Adv Synth Catal, 2024, 366, 3123
DOI: 10.1002/adsc.202400396

Carbon–sulfur bond formation via photochemical strategies: An efficient method for the synthesis of sulfur-containing compounds

Daoshan Yang, Qiuli Yan, Enjie Zhu, Jian Lv and Wei-Min He

Chinese Chemical Letters, 2022, 33, 1798
DOI: 10.1016/j.cclet.2021.09.068

Visible-Light-Promoted Thiyl Radical Generation from Sodium Sulfinates: A Radical–Radical Coupling to Thioesters

Ganganna Bogonda, Dilip V. Patil, Hun Young Kim and Kyungsoo Oh

Org. Lett., 2019, 21, 3774
DOI: 10.1021/acs.orglett.9b01218

Iodine-Mediated Difunctionalization of Imidazopyridines with Sodium Sulfinates: Synthesis of Sulfones and Sulfides

Yu-Jing Guo, Shuai Lu, Lu-Lu Tian, En-Ling Huang, Xin-Qi Hao, Xinju Zhu, Tian Shao and Mao-Ping Song

J. Org. Chem., 2018, 83, 338
DOI: 10.1021/acs.joc.7b02734

Organophotoredox-Catalyzed C–H Alkylation of Imidazoheterocycles with Malonates: Total Synthesis of Zolpidem

Narendra R. Chaubey, Anant R. Kapdi and Biswanath Maity

Synthesis, 2021, 53, 1524
DOI: 10.1055/s-0040-1706103

Recent Advances in the Development of Greener Methodologies for the Synthesis of Benzothiazoles

Nirjhar Saha, Asim Kumar, Bibhuti Bhusan Debnath, Anirban Sarkar and Asit K. Chakraborti

CTMC, 2025, 25, 581
DOI: 10.2174/0115680266347975241217112119