Enantiospecific synthesis of 8-O-methylthioswainsonine from a derivative of D-glucose
作者:Isidoro Izquierdo、Maria T Plaza、F Aragón
DOI:10.1016/0957-4166(96)00330-8
日期:1996.9
The thioanalogue 1, (1R,2S,4S,8R,8 alpha S)-1,2,8-trihydroxy-8-O-methylthioindolizidine of 8-O-methylswainsonine 2 has been enantiospecifically synthesized from the important key intermediate methyl 2-O-methyl-3,6-thioanhydro-alpha-D-mannopyranoside 7, in five steps. Formation of the bicyclic system in 1 took place with a high stereoselectivity. Compound 7 was obtained in eight steps from the readily available methyl alpha-D-glucopyranoside. Copyright (C) 1996 Elsevier Science Ltd