Facile separation catalyst system: direct diastereoselective synthesis of (E)-α,β-unsaturated ketones catalyzed by an air-stable Lewis acidic/basic bifunctional organobismuth complex in ionic liquids

Renhua Qiu; Yimiao Qiu; Shuangfeng Yin; Xingxing Song; Zhengong Meng; Xinhua Xu; Xiaowen Zhang; Shenglian Luo; Chak-Tong Au; Wai-Yeung Wong

doi:10.1039/C004940A

Facile separation catalyst system: direct diastereoselective synthesis of (E)-α,β-unsaturated ketones catalyzed by an air-stable Lewis acidic/basic bifunctional organobismuth complex in ionic liquids†

Renhua Qiu,^a Yimiao Qiu,^a Shuangfeng Yin,*^a Xingxing Song,^a Zhengong Meng,^a Xinhua Xu,^a Xiaowen Zhang,^a Shenglian Luo,^a Chak-Tong Au*^ab and Wai-Yeung Wong*^bc

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* Corresponding authors

^a College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
E-mail: sfyin73@yahoo.com.cn
Fax: +86-731-8882 1310

^b Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, China
E-mail: pctau@hkbu.edu.hk, rwywong@hkbu.edu.hk

^c Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, China

Abstract

The catalyst system that comprises an air-stable bifunctional Lewis acidic/basic organobismuth complex and [Bmim]BF₄ is highly efficient in the cross-condensation of aldehydes with ketones. Through switching the reaction from homogeneous to heterogeneous, the system shows facile separation ability and facile reusability.

Green Chemistry

Facile separation catalyst system: direct diastereoselective synthesis of (E)-α,β-unsaturated ketones catalyzed by an air-stable Lewis acidic/basic bifunctional organobismuth complex in ionic liquids†

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Facile separation catalyst system: direct diastereoselective synthesis of (E)-α,β-unsaturated ketones catalyzed by an air-stable Lewis acidic/basic bifunctional organobismuth complex in ionic liquids

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