Syntheses of two kinds of disaccharide subunits of antitumor antibiotic bleomycins
作者:Rui Che、Qiwen Zhu、Jie Yu、Jiao Li、Jiahui Yu、Wei Lu
DOI:10.1016/j.tet.2017.09.009
日期:2017.10
syntheses of two kinds of bleomycin disaccharides are described. l-gulose subunit 12 was accomplished with a novel and short route in six steps and 37% overall yield from 4, which could be easily prepared from the commercially available inexpensive material d-sorbitol, while 6-deoxy-l-gulose subunit was synthesized in 11 steps in 8% yield from d-glucolactone. The disaccharides were then prepared in a previously