Enantioselective total synthesis of (-)-clavosolide B.

Enantioselective synthesis of 2, a revised structure for (-)-clavosolide B, was accomplished by a convergent approach, where syn-selective aldol, hydroxy-directed cyclopropanation, Mitsunobu inversion, Schmidt-type glycosylation, and macrolactonization reactions were utilized as key reactions. Comparison of 1H and 13C NMR spectra and optical rotation measurement confirmed the relative and absolute stereochemistry of clavosolide B (2).