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Your search keyword '"Yin, Chengkai"' showing total 4 results
Start Over Author "Yin, Chengkai" Topic enantioselective syntheses (incl. cis/trans-isomerism)
4 results on '"Yin, Chengkai"'

1. ChemInform Abstract: Asymmetric [3 + 2] Cycloaddition of Methyleneindolinones with N,N′-Cyclic Azomethine Imines Catalyzed by a N,N′-Dioxide-Mg(OTf)2 Complex.

Author

Yin, Chengkai, Lin, Lili, Zhang, Dong, Feng, Juhua, Liu, Xiaohua, and Feng, Xiaoming

Subjects
*RING formation (Chemistry), *IMINES, *CYCLIC compounds, *SCHIFF bases, *CHEMICAL yield
Abstract

An asymmetric 1,3-dipolar cycloaddition of methyleneoxindoles and cyclic azomethine imines affords spirocyclic pyrazolidines in excellent yields and enantioselectivities under mild reaction conditions. [ABSTRACT FROM AUTHOR]

Published
2016
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2. ChemInform Abstract: N,N′-Dioxide-Magnesium Ditriflate Complex-Catalyzed Asymmetric α-Hydroxylation of β-Keto Esters and β-Keto Amides.

Author

Yin, Chengkai, Cao, Weidi, Lin, Lili, Liu, Xiaohua, and Feng, Xiaoming

Subjects
*MAGNESIUM compounds, *METAL complexes, *METAL catalysts, *KETONIC acids, *HYDROXYLATION, *TETRALONES, *PHASE transitions
Abstract

Chiral N,N-dioxide magnesium complexes are described as efficient catalysts for the α-hydroxylation of cyclic 1-tetralone derived β-keto esters. [ABSTRACT FROM AUTHOR]

Published
2013
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3. ChemInform Abstract: The N,N′-Dioxide/Ni(II)-Catalyzed Asymmetric Inverse-Electron-Demand Hetero-Diels-Alder Reaction of Methyleneindolinones with Hetero-Substituted Alkenes.

Author

Zhou, Yuhang, Lin, Lili, Yin, Chengkai, Wang, Zhengmeng, Liu, Xiaohua, and Feng, Xiaoming

Subjects
*CHEMICAL reactions, *DIASTEREOISOMERS, *NICKEL catalysts
Abstract

The scalable title reaction of various methyleneindolinones with mono- and 1,1-disubstituted acyclic vinyl ethers, ethylvinyl sulfide (X) and dihydropyran (XII) delivers the corresponding products in high yield, with high to excellent diastereomeric excess and with excellent enantioselectivity. [ABSTRACT FROM AUTHOR]

Published
2015
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4. ChemInform Abstract: Catalytic Hetero-ene Reactions of 5-Methyleneoxazolines: Highly Enantioselective Synthesis of 2,5-Disubstituted Oxazole Derivatives.

Author

Luo, Weiwei, Zhao, Jiannan, Yin, Chengkai, Liu, Xiaohua, Lin, Lili, and Feng, Xiaoming

Subjects
*OXAZOLES, *HETEROCYCLIC compound derivatives, *METHYLENE group, *ENANTIOSELECTIVE catalysis, *FUNCTIONAL groups, *MOISTURE
Abstract

This new process proceeds under mild conditions, exhibits a broad substrate scope and functional-group tolerance, and features good air and moisture tolerance. [ABSTRACT FROM AUTHOR]

Published
2014
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