Stereoselective Total Synthesis of (-)-Colletol by Prins Cyclisation

Abstract

A simple and efficient asymmetric total synthesis of the bis-macrolactone (-)-colletol was accomplished, proving the versatility of the Prins cyclisation in natural product synthesis. The synthesis mainly relies upon reductive opening of a pyran ring, Mitsunobu inversion, the Wittig reaction, and Yamaguchi macrolactonisation as the key steps.