Liangru Yang, Xinchi Zhang, Pu Mao, Yongmei Xiao, Huanyu Bian, Jinwei Yuan, Wenpeng Mai and Lingbo Qu
RSC Adv., 2015,5, 25723-25729
DOI:
10.1039/C5RA01706H,
Paper
The synthesis of novel pincer palladium complexes containing ring expanded six-membered N-heterocyclic carbenes (NHCs) via direct metallation of the precursors tetrahydropyrimidin-1-ium hexafluorophosphates in the presence of NaN(SiMe3)2 is presented. The structure has been characterized unambiguously by X-ray single crystal analysis. Catalytic activity investigation showed that the complexes catalyzed the Heck reaction of aryl bromides with acrylate/styrene efficiently when using Et3N as base and DMA as solvent.