(2',3'-O-Isopropylidene-5'-uridyl) 4-(2,3,4,6-tetra-O-acetyl-beta-D-glycopyranosyl)allophanates were obtained in the reactions of 2',3'-O-isopropylidene-uridine and O-peracetylated beta-D-gluco-, galacto- and xylo pyranosylamines, and OCNCOCl. 2,3,4,6-Tetra-O-acetyl-beta-D-glucopyranosyl isocyanate and N-(2',3'-O-isopropylidene-5'-uridyl)urea gave 1-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)-5-(2',3'-O-isopropylidene-5'-uridyl)biuret. Deprotection of the beta-D-gluco configured allophanate and biuret was carried out by standard methods. (C) 2009 Elsevier Ltd. All rights reserved.
(2',3'-O-异丙叉基-5'-
尿苷基) 4-(2,3,4,6-四-O-乙酰基-β-
D-半乳
吡喃糖基)allophanate是由2',3'-O-异丙叉基
尿苷与O-全乙酰基化β-D-葡萄
吡喃糖基胺、β-
D-半乳
吡喃糖基胺和β-D-木
吡喃糖基胺以及OCNCOCl反应得到的。2,3,4,6-四-O-乙酰基β-D-葡萄
吡喃糖基
异氰酸酯和N-(2',3'-O-异丙叉基-5'-
尿苷基)
脲生成1-(2,3,4,6-四-O-乙酰基β-D-葡萄
吡喃糖基)-5-(2',3'-O-异丙叉基-5'-
尿苷基)
脲。以标准方法对β-
D-葡萄糖型allophanate和
脲进行脱保护处理。版权2009 Elsevier Ltd. 保留所有权利。