Utilisation ofL-quebrachitol in natural product synthesis. Total synthesis and absolute configuration of (–)-oudemansin X

Abstract
The stereoselective conversion of the naturally occurring optically active cyclitol, L-quebrachitol 2, into antifungal β-methoxyacrylate, oudemansin X 1 is described. This first total synthesis of 1 fully confirmed the proposed absolute configuration of the antibiotic and showed the importance of 2 as a versatile chiral starting material in natural product syntheses.