The enantioselective total synthesis of (–)-stemoamide using Overman/Claisen rearrangement
of an allylic 1,2-diol is reported. The enantiopure allylic 1,2-diol was efficiently
prepared from naturally occurring dimethyl tartrate. The chirality transfer reactions
through two consecutive [3,3]-sigmatropic rearrangements proceeded with complete diastereoselectivity
in a one-pot process.
Key words
alkaloid - allylic compound - diol - sigmatropic rearrangement - total synthesis