benzyl ester, followed by hydrogenolysis of the benzyloxycarbonyl and benzyl ester groups. Treatment of the O-acetylated serine glycosides with phosgene gave the corresponding N-carboxy-α-amino acid anhydrides or Leuchs' anhydrides which are useful reagents to link sugars to linear and branched synthetic polypeptide antigens. The free serine glycosides were obtained by treatment of the O-acetylated derivatives
摘要d-半
乳糖,
乳糖,
纤维二糖,2-乙酰
氨基-2-脱氧和2-脱氧-2-十二碳酰胺基d-
葡萄糖和O-的O-乙酰化O-(β-glycopyranosyl)-1-
丝氨酸衍
生物通过相应的
乙酰溴糖与N-苄氧基羰基-1-
丝氨酸苄酯的KoenigsKnorr缩合,然后对苄氧基羰基和苄基酯基团进行氢解,来合成乙酰化的O-(α-1-rhamnopyranosyl)-1-
丝氨酸。用
光气处理O-乙酰化的
丝氨酸苷,得到相应的N-羧基-
α-氨基酸酸酐或Leuchs'酸酐,它们是将糖连接到线性和分支的合成
多肽抗原的有用试剂。通过用
甲醇氨处理O-乙酰化衍
生物获得游离的
丝氨酸苷。