Highly Enantioselective Sulfenylation of β-Ketoesters: H-Bond Acceptor Catalysis
作者:Ling Fang、Aijun Lin、Hongwen Hu、Chengjian Zhu
DOI:10.1002/chem.200901099
日期:2009.7.20
A new mode of activation: The asymmetric diarylprolinol‐catalyzed α‐sulfenylation of β‐ketoesters provides the products in good‐to‐excellent enantioselectivities and yields. Studies suggest that the sterically bulky secondary amines activate β‐ketoesters through hydrogen bonding. Lg=leaving group.
Catalytic Asymmetric α‐Alkylsulfenylation with a Disulfide Reagent
作者:Mingying Shi、Qi Zhang、Jiali Gao、Xueling Mi、Sanzhong Luo
DOI:10.1002/anie.202209044
日期:2022.9.26
A disulfide-based alkylthio transfer reagent was developed for the asymmetric α-alkylsulfenylation of ketones and aldehydes, showing good activity and stereoselectivity when combined with primary amine organocatalysis.