Total synthesis of VIM-2 ganglioside isolated from human chronic myelogenous leukemia cells
作者:Taro Ehara、Akihiko Kameyama、Yutaka Yamada、Hideharu Ishida、Makoto Kiso、Akira Hasegawa
DOI:10.1016/0008-6215(95)00353-3
日期:1996.2
A total synthesis of the tumor-associated glycolipid antigen, VIM-2, is described [2]. Phenyl 2,3,4-tri-O-benzoyl-6-O-benzyl-beta-D-galactopyranosyl-(1-->4)-6-O-benzy l-2- deoxy-2-phthalimido-1-thio-beta-D-glucopyranoside (7), a key intermediate prepared by condensation of phenyl 6-O-benzyl-2-deoxy-2-phthalimido-1-thio-beta-D-glucopyranoside (6) and 2,3,4-tri-O-benzoyl-6-O-benzyl-alpha-D-galactopyranosyl
描述了肿瘤相关糖脂抗原VIM-2的全合成[2]。苯基2,3,4-三-O-苯甲酰基-6-O-苄基-β-D-吡喃半乳糖基-(1-> 4)-6-O-苄基l-2-脱氧-2-邻苯二甲酰亚胺-1-硫代β-D-吡喃葡萄糖苷(7)是通过将苯基6-O-苄基-2-脱氧-2-邻苯二甲酰亚胺基-1-硫代β-D-吡喃葡萄糖苷(6)与2,3缩合制得的关键中间体,将4-三-O-苯甲酰基-6-O-苄基-α-D-吡喃半乳糖基溴化物(5)与甲基2,3,4-三-O-苄基-1-硫代-β-L-呋喃二糖苷( 8)得到三糖供体9,其与2-(三甲基甲硅烷基)乙基2,4,6-三-O-苄基-β-D-吡喃半乳糖基-(1→4)-2,3偶联, 6-三-O-苄基是ta-D-吡喃葡萄糖苷(10),得到五糖11。12的区域选择性糖基化(通过11的O-去苯甲酰化获得)得到七糖13,