The First Enantioselective Organocatalytic Mukaiyama−Michael Reaction: A Direct Method for the Synthesis of Enantioenriched γ-Butenolide Architecture
作者:Sean P. Brown、Nicole C. Goodwin、David W. C. MacMillan
DOI:10.1021/ja029095q
日期:2003.2.1
an important chiralsynthon found among many natural isolates. The (2S,5S)-5-benzyl-2-tert-butyl-imidazolidinone amine catalyst has been found to mediate the conjugate addition of a wide variety of substituted and unsubstituted silyloxy furans to unsaturated aldehydes. A diverse range of aldehyde substrates can be accommodated in this new organocatalytic transformation. Application of this new asymmetric
1,4-Addition of silicon dienoates to α,β-unsaturated aldehydes catalyzed by in situ-generated silicon Lewis acid
作者:Hikaru Yanai、Arata Takahashi、Takeo Taguchi
DOI:10.1039/c0cc02438d
日期:——
In situ-generated silyl methide species (R(3)Si-CTf(2)R') effectively catalyzed the reaction of beta-substituted alpha,beta-unsaturated aldehydes with silicon dienoates such as 3-bromo-2-TESO-furan to give the corresponding gamma-adducts with excellent 1,4-selectivity and good anti selectivity.
Asymmetric Vinylogous Michael Reaction of α,β-Unsaturated Aldehyde with Buteno-4-lactone
作者:Xiaoyan Luo、Zhiqiang Zhou、Feng Yu、Xin Li、Xinmiao Liang、Jinxing Ye
DOI:10.1246/cl.2011.518
日期:2011.5.5
The asymmetric vinylogous Michaelreactions of α,β-unsaturated aldehydes with γ-butenolide(buteno-4-lactone) were efficiently catalyzed by the Jorgensen–Hayashi catalyst and LiOAc. The desired prod...