申请人:Biomira, Inc.
公开号:US04935503A1
公开(公告)日:1990-06-19
The invention describes a one-pot single step procedure for the azidochlorination or diazidization of glycals, including glycal elements of carbohydrates. Compounds such as 3,4,6-tri-O-benzyl-2-azido-2-deoxy-alpha-D-galactopyranosy chloride, and 3,4,6-tri-O-benzyl-2-azido-2-deoxy-alpha-,beta-D-galactopyranose are prepared from tri-O-benzyl galactal as well as 3,4,6-tri-O-acetyl-2-azido-2-deoxy-D-alpha-galactopyranasol chloride and 3,6-di-O-acetyl-4-O-[2,3,4,6-tetra-O-acetyl-beta-D-galactopyranosyl]-2-azi do-2-deoxy-alpha-D-glycopyranosyl chloride from their respective O-acetylated glycal derivatives by the addition of azido chloride which is chemically generated in situ. A method using 3,4,6-tri-O-acetyl-2-azido-2-deoxy-alpha-D-galactopyranosyl chloride for the synthesis of antigenic determinants such as the terminal asialo GM.sub.1 (beta-D-Gal (1->3)-beta-D-GalNAc-OR) has been demonstrated. The conversion of the subject synthon into 3,4,6-tri-O-acetyl-2-azido-2-deoxy-alpha-D-galactopyranosyl bromide and 1,3,4,6-tetra-O-acetyl-2-azido-2-deoxy-alpha-D-galactopyranose is also described. A further method for the synthetic generation of the Tn antigen (alpha-D-GalNAc-O-L-serine) is also described.
该发明描述了一种一锅法单步程序,用于对半乳糖糖元进行偶氮氯化或偶氮化反应。从三重苯基半乳糖醛制备化合物,如3,4,6-三-O-苄基-2-偶氮基-2-脱氧-α-D-半乳糖吡喃糖氯化物,以及3,4,6-三-O-苄基-2-偶氮基-2-脱氧-α,β-D-半乳糖吡喃糖。还从它们各自的O-乙酰化半乳糖糖元衍生物中制备3,4,6-三-O-乙酰化-2-偶氮基-2-脱氧-D-α-半乳糖吡喃糖氯化物和3,6-二-O-乙酰化-4-O-[2,3,4,6-四-O-乙酰-β-D-半乳糖吡喃糖基]-2-偶氮基-2-脱氧-α-D-葡萄糖吡喃糖氯化物。已证明使用3,4,6-三-O-乙酰化-2-偶氮基-2-脱氧-α-D-半乳糖吡喃糖氯化物合成抗原决定因子,如终末非唾液酸GM.sub.1(β-D-Gal(1->3)-β-D-GalNAc-OR)的方法。还描述了将该合成物转化为3,4,6-三-O-乙酰化-2-偶氮基-2-脱氧-α-D-半乳糖吡喃糖溴化物和1,3,4,6-四-O-乙酰化-2-偶氮基-2-脱氧-α-D-半乳糖吡喃糖的方法。还描述了一种合成Tn抗原(α-D-GalNAc-O-L-丝氨酸)的进一步方法。