Stereodivergence in the Ireland–Claisen Rearrangement of α-Alkoxy Esters
作者:Maša Podunavac、Jacob J. Lacharity、Kerry E. Jones、Armen Zakarian
DOI:10.1021/acs.orglett.8b02011
日期:2018.8.17
A systematic investigation into the Ireland–Claisenrearrangement of α-alkoxy esters is reported. In all cases, the use of KN(SiMe3)2 in toluene gave rearrangement products corresponding to a Z-enolate intermediate with excellent diastereoselectivity, presumably because of chelation control. On the other hand, chelation-controlled enolate formation could be overcome for most substrates through the