The synthesis of O-(2-acetamido-2-deoxy-β-d-glucopyranosyl)-(1→4)-N-acetylnormuramoyl-l-α-aminobutanoyl-d-isoglutamine
作者:Jiřz Farkaš、Miroslav Ledvina、Josef Brokeš、Jan Ježek、Jaroslav Zajíček、Milan Zaoral
DOI:10.1016/0008-6215(87)80165-9
日期:1987.6
-benzyl-2-deoxy-4- O -(3,4,6-tri- O -acetyl-2-deoxy-2-phthalimido-β- d -glucopyranosyl)- α- d -glucopyranoside ( 4 ) was obtained in high yield on using the silver triflate method in the absence of base. Compound 4 was converted in six steps into benzyl 2-acetamido-4- O -(2-acetamido-3,4,6-tri- O -benzyl-2-deoxy-β- d -glucopyranosyl)-6- O -benzyl-3- O -(carboxymethyl)-2-deoxy-α- d - glucopyranoside, which
摘要苄基2-乙酰氨基-3- O-烯丙基-6- O-苄基-2-脱氧-4- O-(3,4,6-三-O-乙酰基-2-脱氧-2-邻苯二甲酰亚胺-β-d在不存在碱的情况下使用三氟甲磺酸银方法以高收率获得-(吡喃葡萄糖基)-α-d-吡喃葡萄糖苷(4)。化合物4经六步转化为苄基2-乙酰氨基-4-O-(2-乙酰氨基-3,4,6-三-O-苄基-2-脱氧-β-d-吡喃葡萄糖基)-6-O-苄基将-3-O-(羧甲基)-2-脱氧-α-d-吡喃葡萄糖苷与1-α-氨基丁酰基-d-异谷氨酰胺的苄基酯偶联,并将产物进行氢水解,得到标题化合物。苄基2-乙酰氨基-4- O-(2-乙酰氨基-2-脱氧-β-d-吡喃葡萄糖基)的O-苄基化-3-O-烯丙基-6-O-苄基-2-脱氧-α-d-吡喃葡萄糖苷通过对反应混合物进行超声处理,大大增强了用苄基溴和氢氧化钡在N,N-二甲基甲酰胺中的抗氧化剂。