Enantioselective deprotonation of the monoacetals of bicyclo[3.3.0]octan-3,7-dione. An approach to the asymmetric synthesis of chiral synthons for carbacyclins
作者:Hiroyuki Izawa、Ryuichi Shirai、Hisashi Kawasaki、Hee-doo Kim、Kenji Koga
DOI:10.1016/s0040-4039(01)93940-1
日期:1989.1
Kinetic deprotonation of the monoacetals (4) of bicyclo[3.3.0]octan-3,7-dione by chiral lithium amides (5) in the presence of excess trimethylsilyl chloride afforded the corresponding silyl enol ethers (6), useful synthons for the synthesis of optically active carbacyclins, in up to 94% ee.
双环[3.3.0] octan-3,7-dione的单缩醛(4)在过量的三甲基甲硅烷基氯的存在下被手性锂酰胺(5)动力学脱质子化,得到相应的甲硅烷基烯醇醚(6)。高达94%ee的光学活性碳环素的合成。