Base-Base Bifunctional Catalysis: A Practical Strategy for Asymmetric Michael Addition of Malonates to α,β-Unsaturated Aldehydes
作者:Yongcan Wang、Pengfei Li、Xinmiao Liang、Jinxing Ye
DOI:10.1002/adsc.200800070
日期:2008.6.9
Lewis base–Brønsted base bifunctional catalysis is a novel and practical strategy for the asymmetricMichaeladdition. The addition of malonates to a series of α,β-unsaturated aldehydes can take place under base–base bifunctional catalytic conditions using 0.5–5 mol% of (S)-2-[diphenyl(trimethylsilyloxy)methyl]pyrrolidine as catalyst and 5–30 mol% of lithium 4-fluorobenzoate as additive base with up
Merging organocatalysis with transition metal catalysis and using O2 as the oxidant for enantioselective C–H functionalization of aldehydes
作者:Yong-Long Zhao、Yao Wang、Xiu-Qin Hu、Peng-Fei Xu
DOI:10.1039/c3cc44214d
日期:——
A new catalytic Saegusa oxidation-Michael addition cascade reaction has been developed for the enantioselective beta-functionalization of aldehydes. The feature of this research is the combination of organocatalysis and transition-metal catalysis for the asymmetric C-H functionalization which remains an underdeveloped research topic.