A convergent and stereoselective synthesis of cochliomycin A, a 14-membered resorcyclic acid lactone, based on chiron approach is described. The key reactions involved olefin cross-metathesis and sodium hydride promoted one-pot intramolecular lactonization. L-Arabinose was used as a chiral pool material for the construction of the key fragment. (C) 2014 Elsevier Ltd. All rights reserved.