Development of Novel Diastereoselective Alkenylation of Enolates Using Alkenylselenonium Salts
作者:Shin-ichi Watanabe、Takahiro Ikeda、Tadashi Kataoka、Genzoh Tanabe、Osamu Muraoka
DOI:10.1021/ol027494k
日期:2003.2.1
text] A novel alkenylation of enolates using alkenylselenonium salts is described. A reaction of lithium enolates, which were prepared in situ by the reaction of LiHMDS and carbonyl compounds, with alkenylselenonium salts gave the ethenylation products of carbonyl compounds in high yield. Diastereoselective alkenylation was also accomplished by the reaction of the enolates derived from N-acyl-1,3-oxazolidin-2-ones
[反应:见正文]描述了使用烯基硒鎓盐对烯醇盐进行新的烯基化。通过LiHMDS和羰基化合物的反应原位制备的烯醇锂与烯基硒鎓盐的反应以高收率得到了羰基化合物的乙烯基化产物。非对映选择性烯基化也可以通过衍生自N-酰基-1,3-恶唑烷-2-酮的烯醇化物与烯基硒鎓盐的反应来实现,以得到良好的结果(产率高达92%,de高达95%)。