A new route to the disaccharide moiety (2-O-(3-O-carbamoyl-α-d-mannopyranosyl)-l-gulopyranose) of the antitumor agent bleomycin was developed. Both the l-gulose synthon 21 and the 3-O-carbamoyl-d-mannose segment 30 were prepared from d-mannose in a regioselective manner by applying stannylene acetal methodology. Glycosylation of 21 with 30 proceeded smoothly, and further conversion to disaccharide
Preparation of 2-O-(3-O-carbamoyl-α-d-mannopyranosyl)-l-gulopyranose: Synthetic study on the sugar moiety of antitumor antibiotic bleomycin
作者:Tetsuta Oshitari、Susumu Kobayashi
DOI:10.1016/0040-4039(94)02458-n
日期:1995.2
A new practical route to the disaccharidemoiety of bleomycin was developed. Both of key building blocks 9 and 16 were prepared from d-mannose in a regioselective manner by applying stannylene acetal methodology. Glycosylation of the allyl alcohol 9 with the trichloroacetimidate 16 proceeded smoothly, and the further incorporation to the disaccharidemoiety was successfully accomplished.