Photochemically Promoted Aza-Diels–Alder-Type Reaction: High Catalytic Activity of the Cr(III)/Bipyridine Complex Enhanced by Visible Light Irradiation
作者:Noriyoshi Arai、Takeshi Ohkuma
DOI:10.1021/acs.joc.7b00838
日期:2017.7.21
Aza-Diels–Alder-type cycloaddition reactions between a range of N-arylimines and functionalized alkenes were effectively catalyzed by the Cr(III)/bipyridine complex under irradiation of blue light, to give the corresponding 1,2,3,4-tetrahydroquinoline derivatives in high yields with excellent diastereoselectivity. Typically, the reaction of benzylideneaniline with 1-vinyl-2-pyrrolidinone proceeded
Cr(III)/联吡啶配合物在蓝光照射下可有效催化一系列N-芳基丙氨酸和官能化烯烃之间的Aza-Diels-Alder型环加成反应,得到相应的1,2,3,4-四氢喹啉高产率的非对映异构体衍生物。通常,亚苄基苯胺与1-乙烯基-2-吡咯烷酮的反应在底物与催化剂的摩尔比(S / C)为1000的情况下平稳进行,并在室温(20–25°C)下4小时内完成,从而获得环加成产物的产率为97%。