Asymmetric alkylation using chiral cyclic diols to prepare a quaternary carbon
摘要:
Asymmetric alkylation of cyclic and acyclic beta-keto ester acetals (4, 5, 13, 14, and 18) with C-2-symmetric cycloalkane-1,2-dioxy moiety proceeded in a highly diastereoselective manner to afford enol ethers (9-12, 15-17, 19a-c) with a chiral quaternary carbon.
Asymmetric Alkylation of Chiral α,β-unsaturated lactones
作者:Keisuke Kato、Hiroshi Suemune、Kiyoshi Sakaik̊
DOI:10.1016/s0040-4039(00)92668-6
日期:1992.6
Alkylation of 5, prepared from six-membered β-keto ester and (S,S)-cyclohexane-1,2-diol, proceeded in highly diastereoselective manner to afford a quaternary carbon.