1-nitrate-ester modality for alcohol, alkoxy, and azide coupling partners with minimal purification. While direct glycosylation of nitrate esters ultimately proved unsuccessful, we have demonstrated that an anomeric nitrate-ester can be converted directly to a trichloroacetimidate in a short and simple one-pot procedure, bypassing lower yielding two-step sequences.
在无试剂的条件下,将一系列在C-3,C-4和C-6位置受保护的
碳水化合物2-
叠氮基-
硝酸盐酯进行热
水解。该初步结果已扩展为以最少的纯化将1-
硝酸酯-
酯形式直接交换为醇,烷
氧基和
叠氮化物偶联伙伴。虽然最终证明
硝酸酯的直接糖基化是不成功的,但我们已经证明,可以在短而简单的一锅法中将异头的
硝酸酯直接转化为三
氯乙
酰亚胺酸
酯,而绕过了较低的收率两步法。