Diaminomethylenemalononitrile as a Chiral Single Hydrogen Bond Catalyst: Application to Enantioselective Conjugate Addition of α‐Branched Aldehydes
作者:Masahiro Kawada、Ryo Tsuyusaki、Kosuke Nakashima、Hiroshi Akutsu、Shin‐ichi Hirashima、Takashi Matsumoto、Hikaru Yanai、Tsuyoshi Miura
DOI:10.1002/asia.202100487
日期:2021.8.16
a N,N-disubstituted structure, promoted enantioselective conjugate addition reaction of α-branched aldehydes with vinyl sulfone, affording adducts with excellent enantioselectivities (up to 96% ee). Mechanistic studies revealed that the diaminomethylenemalononitrile motif holds the vinyl sulfone substrate using a single hydrogen bond accompanied by multiple weak interactions, including electrostatic
一种改进的二氨基亚甲基丙二腈有机催化剂,带有N,N-二取代结构,促进了 α-支化醛与乙烯基砜的对映选择性共轭加成反应,提供具有优异对映选择性(高达 96% ee)的加合物。机理研究表明,二氨基亚甲基丙二腈基序使用单个氢键结合多个弱相互作用,包括静电 C−H⋅⋅⋅O 相互作用,从而固定乙烯基砜底物。