Stereoselective synthesis of polyoxygenated atisane-type diterpenoids
作者:Antonio Abad、Consuelo Agulló、Ana C Cuñat、Ismael Navarro
DOI:10.1016/s0040-4039(01)01953-0
日期:2001.12
stereoselective approach to polyoxygenated atisane-type diterpenes starting from (S)-(+)-carvone is described. The key steps involve an intramolecular Diels–Alder reaction, an unusual intramolecular diazo ketone cyclopropanation of an unsaturated ketone, and a regioselective endocyclic cleavage of a cyclopropyl carbinyl radical as key synthetic steps. The synthesis of the bioactive polyoxygenated atisanes atis-16(17)-en-3