A strategy to control the switch between a non-cycloaddition reaction and a cycloaddition reaction of enals, using N-heterocyclic carbene (NHC) catalyisis, has been developed. The new scalable protocol leads to gamma-amino-acid esters bearing a tetrasubstituted stereocenter in good yields and high stereoselectivities by homo-Mannich reactions of enals and isatin-derived ketimines. By simply changing the N-ketimine substituent to an ortho-hydroxy phenyl group, the corresponding spirocyclic oxindolo-gamma-lactams are obtained.
机构:
Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R ChinaHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China
Xie, Danbo
Yang, Limin
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Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R ChinaHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China
Yang, Limin
Lin, Youqiang
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Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R ChinaHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China
Lin, Youqiang
Zhang, Zhiming
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Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R ChinaHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China
Zhang, Zhiming
Chen, Dongdong
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Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R ChinaHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China
Chen, Dongdong
Zeng, Xiaofei
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Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R ChinaHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China
Zeng, Xiaofei
Zhong, Guofu
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Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R ChinaHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 310036, Zhejiang, Peoples R China
机构:
School of Chemical Sciences, University of the Chinese Academy of SciencesSchool of Chemical Sciences, University of the Chinese Academy of Sciences
Kun-Quan Chen
He Sheng
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School of Chemical Sciences, University of the Chinese Academy of SciencesSchool of Chemical Sciences, University of the Chinese Academy of Sciences
He Sheng
Qiang Liu
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School of Chemical Sciences, University of the Chinese Academy of SciencesSchool of Chemical Sciences, University of the Chinese Academy of Sciences
Qiang Liu
Pan-Lin Shao
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College of Innovation and Entrepreneurship, Southern University of Science and TechnologySchool of Chemical Sciences, University of the Chinese Academy of Sciences
Pan-Lin Shao
Xiang-Yu Chen
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School of Chemical Sciences, University of the Chinese Academy of SciencesSchool of Chemical Sciences, University of the Chinese Academy of Sciences