Asymmetric Dihydroxylations of Enynes with a Trisubstituted C═C Bond. An Unprecedented Route to γ-Lactone Building Blocks with a Quaternary Stereocenter
作者:Heike Burghart-Stoll、Tobias Kapferer、Reinhard Brückner
DOI:10.1021/ol103061g
日期:2011.3.4
comprehensive set of hydroxylactone building blocks (4R,5R)-, (4R,5S)-, (4S,5R)-, and (4S,5S)-5a, Sharpless asymmetric dihydroxylations of allylic chlorides (E)- and (Z)-9 were performed. They delivered the four stereoisomers of diol 10 with up to 92% ee and absolute configurations, which were proven to be in accordance with the Sharpless mnemonic.
途中将获得一组全面的羟基内酯结构单元(4 R,5 R)-,(4 R,5 S)-,(4 S,5 R)-和(4 S,5 S)-5a,Sharpless不对称进行了烯丙基氯化物(E)-和(Z)-9的二羟基化。他们提供了具有高达92%ee和绝对构型的四种二醇10立体异构体,事实证明它们符合Sharpless助记符。