Catalytic asymmetric tandem Friedel–Crafts alkylation/Michael addition reaction for the synthesis of highly functionalized chromans
作者:Jiahuan Peng、Da-Ming Du
DOI:10.3762/bjoc.9.137
日期:——
The enantioselective tandem Friedel-Crafts alkylation/Michaeladditionreaction of indoles with nitroolefin enoates catalyzed by a diphenylamine-linked bis(oxazoline)-Zn(OTf)2 complex was investigated. This tandem reaction afforded functionalizedchiral chromans in good yields with moderate to high stereoselectivities (up to 95:5 dr, up to 99% ee).