An efficient stereoselective synthesis of the amino sugar component (E ring) of calicheamicin γ1I
作者:Paolo Crotti、Valeria Di Bussolo、Lucilla Favero、Franco Macchia、Mauro Pineschi
DOI:10.1016/0957-4166(96)00074-2
日期:1996.3
A simple, efficient, stereoselective synthesis of the methyl 2,4-dideoxy-4-(ethylamino)-3-O-methyl-β-L-threo-pentopyranoside2, corresponding to the E monosac-charide unit (E ring) of calicheamicin 1, is described. The synthetic procedure utilizes the methyl 2-deoxy-β-D-ribopyranoside 3 as the enantiopure starting material and the acid methanolysis of the intermediate activated aziridine 12 to give