Synthesis of four structural elements of xylose-containing carbohydrate chains from N-glycoproteins
作者:János Kerékgyártó、Johannis P. Kamerling、Jan B. Bouwstra、Johannes F.G. Vliegenthart、András Lipták
DOI:10.1016/0008-6215(89)84004-2
日期:1989.2
promoter, afforded the trisaccharide-glycoside derivative 13, which was transformed into the acetylated trisaccharide-glycoside 16. The disaccharide derivative 10, obtained from 8, and the trisaccharide derivative 15, obtained from 13, were glycosylated at position 3 with O-(2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranosyl)trichloroacetimidate (19), using trimethylsilyl triflate as a promoter, giving rise
寡糖β-D-Xylp-(1 ---- 2)-β-D-Manp-OMe(12),β-D-Xylp-(1 ---- 2)-[α-D]的合成-Manp-((1 ---- 6)]-beta-D-Manp + ++-OMe(17),beta-D-Xylp-(1 ---- 2)-[alpha-D-Manp-(1 ---- 3)]-beta-D-Manp + ++-OMe(21)和beta-D-Xylp-(1 ---- 2)-[alpha-D-Manp-(1 ---- 3)描述了[α-D-Manp-(1-6)]-β-D-Manp-OMe(25)。由相应的糖基表观分子(4)通过氧化,然后进行立体选择性还原,来制备甲基3-O-苄基-4,6-O-异亚丙基-β-D-甘露吡喃糖苷(6)。在氰化汞的存在下,6与2,3,4-三-O-乙酰基-α-D-吡喃吡喃糖基溴的缩合得到甲基3-O-苄基-4,6-O-异亚丙基-1:9的混合物2-O-(2