Trisubstituted 2-Trifluoromethyl Pyrrolidines via Catalytic Asymmetric Michael Addition/Reductive Cyclization
作者:Michael T. Corbett、Qihai Xu、Jeffrey S. Johnson
DOI:10.1021/ol500679w
日期:2014.5.2
2-trifluoromethyl pyrrolidines by asymmetric Michaeladdition/hydrogenative cyclization is described. The direct organocatalytic addition of 1,1,1-trifluoromethylketones to nitroolefins proceeds under mild reaction conditions and low catalyst loadings to provide Michael adducts in high yield with excellent diastereo- and enantioselectivity. Catalytic hydrogenation of the Michael adducts stereoselectively generates