A convenient synthesis for anomeric 2-thioglucobioses, 2-thiokojibiose and 2-thiosophorose
作者:Jacques Defaye、Jean-Michel Guillot
DOI:10.1016/0008-6215(94)80064-2
日期:1994.2
2-S-alpha-D-Glucopyranosyl-2-thio-D-glucopyranose (2-thiokojibiose, 8) and 2-S-beta-D-glucopyranosyl-2-thio-D-glucopyranose (2-thiosophorose, 14) were conveniently prepared by SN2 reaction of the corresponding anomers of 2,3,4,6-tetra-O-acetyl-1-thio-D-glucopyranose with 1,3,4,6-tetra-O-acetyl-2-O-tri-flyl-beta-D-mannopyranose, followed by a deprotection sequence for the anomeric acetate involving conversion into the
分别是2-S-α-D-Glucopyranosyl-2-thio-D-吡喃葡萄糖(2-thiokojibiose,8)和2-S-β-D-葡萄糖吡喃糖基-2-thio-D-Dy-吡喃葡萄糖(2-thiosophorose,14)。通过2,3,4,6-四-O-乙酰基-1-硫基-硫代-D-吡喃葡萄糖的相应异构体与1,3,4,6-四-O-乙酰基-2-O-的SN2反应方便地制备三-flyl-β-D-甘露吡喃糖,然后是异头乙酸酯的脱保护序列,涉及到1-丙烯基糖苷的转化。碱性O-脱乙酰化后,在pH约2的条件下丙烯基顺利水解。