Studies on the synthesis of propyl 4-O-β-d-galactopyranosyl-α-d-galactopyranoside
作者:Hamdy A. El-Shenawy、Conrad Schuerch
DOI:10.1016/0008-6215(84)85244-1
日期:1984.8
2-O-Benzoyl-3,6-di-O-benzyl-4-O-(chloroacetyl)-, 4-O-acetyl-2-O-benzoyl-3,6-di-O-benzyl-, and 2-O-benzoyl-3,4,6-tri-O-benzyl-alpha-D-galactopyranosyl chloride were converted into the corresponding 2,2,2-trifluoroethanesulfonates, and these were treated with allyl 2-O-benzoyl-3,6-di-O-benzyl-alpha-D-galactopyranoside, to give allyl 2-O-benzoyl-4-O-[2-O-benzoyl-3,6-di-O-benzyl-4-O-(chloroacetyl)- be
2-O-苯甲酰基-3,6-二-O-苄基-4-O-(氯乙酰基)-,4-O-乙酰基-2-O-苯甲酰基-3,6-二-O-苄基-和2将-O-苯甲酰基-3,4,6-三-O-苄基-α-D-吡喃半乳糖基氯转化为相应的2,2,2-三氟乙烷磺酸盐,并用烯丙基2-O-苯甲酰基-3处理, 6-二-O-苄基-α-D-吡喃半乳糖苷,得到烯丙基2-O-苯甲酰基-4-O- [2-O-苯甲酰基-3,6-二-O-苄基-4-O-(氯乙酰基)-β-D-吡喃半乳糖苷] -3,6-二-O-苄基-α-D-吡喃半乳糖苷(26; 41%产率),烯丙基4-O-(4-O-乙酰-2-O-苯甲酰基- 3,6-二-O-苄基-β-D-吡喃半乳糖基)-2-O-苯甲酰基-3,6-二-O-苄基-α-D-吡喃半乳糖苷(27;收率62%)和烯丙基2- O-苯甲酰基-4-O-(2-O-苯甲酰基-3,4,6-三-O-苄基-β-D-吡喃半乳糖基)-3,6-二-O-苄基-α-D-吡喃半乳糖苷(