Syntheses of deoxy analogues of methyl 3,6-di-O-α-d-mannopyranosyl-α-d-mannopyranoside for studies of the binding site of Concanavalin A
作者:Stefan Oscarson、Ulf Tedebark
DOI:10.1016/0008-6215(95)00268-5
日期:1995.12
All of the monodeoxy analogues of methyl 3,6-di-O-alpha-D-mannopyranosyl-alpha-D-mannopyranoside have been synthesized together with two dideoxy (2,3'- and 4,3'-) analogues. The 2'- and 2"-deoxy functions were introduced by NIS-promoted couplings with 2,3,4-tri-O-acetyl-D-glucal as donor, followed by reduction of the resulting 2'- and 2"-iodo derivatives, whereas the 3'-, 3"-, 4'-, 4"-, 6'-, and 6"-deoxy
甲基3,6-二-O-α-D-甘露吡喃糖基-α-D-甘露吡喃糖苷的所有单脱氧类似物已经与两个双脱氧(2,3′-和4,3′-)类似物一起合成。通过2',3,4-三-O-乙酰基-D-葡萄糖作为供体的NIS促进的偶联引入2'-和2“-脱氧功能,然后还原所得2'-和2”-碘衍生物,而3'-,3“-,4'-,4”-,6'-和6“-脱氧官能团是通过在三氟甲磺酸银促进的偶联反应中使用已知的脱氧糖基氯作为供体引入的。2-使用三碘咪唑和三苯基膦通过置换引入中心甘露糖残基上的4-脱氧官能团,