Highly stereoselective total synthesis of methynolide, the aglycon of the 12-membered macrolide antibiotic methymycin. I. Synthesis of a prelog-djerassi lactone-type chiral intermediate from D-glucose.
Highly stereoselective total synthesis of methynolide, the aglycon of the 12-membered macrolide antibiotic methymycin. I. Synthesis of a prelog-djerassi lactone-type chiral intermediate from D-glucose.
1,3,5-trideoxy-3,5-di-C-methyl-l-talitol: a chiron for the C-33–C-37 segment of amphotericin B
作者:David Liang、Ann DeCamp Schuda、Bert Fraser-Reid
DOI:10.1016/0008-6215(87)80132-5
日期:1987.7
Abstract 1,3,5-Trideoxy-3,5-di-C-methyl- l -talitol is a potential chiron for the C-33–C-37segment of amphotericinB. This hexitol has been synthesized from 3-O-benzyl-1,2-O-isopropylidene-α- d -glucofuranose by a route in which a C-methylene derivative at C-5 is hydroborated, to give a single C-5 epimer. The extent of stereoselectivity has been found to be dependent on the substitution patterns at