Organocatalytic enantioselective tandem Michael addition-oxidation of 3-substituted oxindoles with 1,4-benzoquinone |
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| Authors: | Yonghong Zhang Xiaoyan Hu Shuaishuai Li Yijun Liao Weicheng Yuan Xiaomei Zhang |
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| Affiliation: | 1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | By employing a chiral bifunctional thiourea-tertiary amine as catalyst, enantioselective tandem Michael addition-oxidation of 3-monosubstituted oxindoles with 1,4-benzoquinones were realized. The reactions afforded a wide range of 3,3-disubstituted oxindoles with moderate to good yields (up to 87%) in moderate to good enantioselectivities (up to 96%). |
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| Keywords: | 1,4-Benzoquinones Oxindoles Enantioselective catalysis Tandem reaction Organocatalyst |
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