Diastereoselective ring—opening of 12-acetoxy-9α and 9β(11)-epoxy-7-drimene: Homochiral semisynthesis of poligodial and warburganal

Abstract Starting from a zamoranic acid derivative (Methyl 15-tetrahydropiranyloxy-7-labden-17-oate) poligodial and warburganal have been synthesized in several steps with a 55% overall yield and 27% overall yield, respectively.