Diastereoselectivity of the thio-Claisen rearrangement of acyclic precursors bearing a chiral centre adjacent to carbon 6
作者:Stéphane Désert、Patrick Metzner
DOI:10.1016/s0040-4020(01)88337-x
日期:1992.11
allylic alcohols have been prepared and submitted to a Mitsunobu reaction with dithioacetic acid. Allyl dithioesters were deprotonated by LDA at −30°C and resulting enethiolates were quenched with iodomethane to afford quantitatively S-allyl ketenedithioacetals. These precursors undergo a thio-Claisenrearrangement under smooth conditions: room temperature or heating at 101°C. The diastereoselectivity of