Asymmetric synthesis of homochiral dibenzylbutyrolactone lignans by conjugate addition to a chiral butenolide
作者:Andrew Pelter、Robert S. Ward、D. Martin Jones、Peter Maddocks
DOI:10.1016/s0957-4166(00)82273-9
日期:1990.1
Addition of sulphur stabilised carbanions to a chiral non-racemic butenolide followed by reaction with an aromatic aldehyde affords a short synthesis of homochiral dibenzylbutyrolactone derivatives. Desulphurisation of the first formed adducts proceeds in almost quantitative yield to afford the parent lignan.