Stereoselective α-Quaternization of 3-Methoxycycloalk-2-enones via 1,4-Diastereoinduction of Alkoxy Dienolates
作者:Gamal A. I. Moustafa、Yasumasa Kamada、Tetsuaki Tanaka、Takehiko Yoshimitsu
DOI:10.1021/jo2022789
日期:2012.1.20
The alkylation of dienolates generated from 3-methoxycycloalk-2-enones having a 3'-hydroxyl alkenyl chain provides the corresponding quaternized cycloalkenones in a highly diastereoselective manner. The high degree of stereocontrol in the alpha-quaternization possibly implies intervention of a rigid chelating transition state that allows an efficient 1,4-asymmetric induction to take place.