作者:Guixian Hu、Andrea Vasella
DOI:10.1002/hlca.200490217
日期:2004.9
known methanesulfonate 2. Oxidation of 4 with t-BuOCl in the presence of 2,6-lutidine afforded the tetrazene 6 (63%). Oxidation with MnO2 gave the deaminated lactam 7 (40%), which was also obtained, together with the lactone 8, upon oxidation of 4 with PhSeO2H. Oxidation with Mn(OAc)3/Cu(OAc)2 provided the lactam 7 as the major and the dimer 9 as the minor product. Oxidation of 4 with 3 equiv. of Pb(OAc)4
所述Ñ氨基核糖酸-1,5-内酰胺4以两个高产步骤制备从已知的甲磺酸酯2。在2,6-二甲基吡啶存在下,用t- BuOCl氧化4,得到四烯6(63%)。用MnO 2氧化得到脱氨基的内酰胺7(40%),当用PhSeO 2 H氧化4时,它也与内酯8一起获得。用Mn(OAc)3 / Cu(OAc)2氧化得到内酰胺7作为主要和二聚体9作为次要产品。4当量与3当量的氧化。在室温下,于甲苯中溶解Pb(OAc)4,得到两个环戊烷。乙酰氧基环氧化物10和重氮酮11的总产率为78%。氧化用PB(OBZ)4提供11和结晶苯甲酰氧基环氧化物12。通过X射线分析确定了12的晶体结构。所述Ñ氨基glyconolactams 41,46和51类似地制备到4。用Pb(OAc)4氧化可得到重氮酮56、57和58是唯一可隔离的产品。在DMSO存在下,用Pb(OAc)4氧化N-氨基甘露聚糖-1,5-内酰胺55,得到亚磺酰亚胺59