Chemo- and regioselective ring-opening of donor–acceptor oxiranes with <i>N</i>-heteroaromatics
作者:Ji-Wei Sang、Ming-Sheng Xie、Man-Man Wang、Gui-Rong Qu、Hai-Ming Guo
DOI:10.1039/d1cc00600b
日期:——
The first ring-opening of D–A oxiranes with N-heteroaromatics in a chemoselective C–C bond cleavage manner was achieved. In the presence of 5 mol% of Y(OTf)3 as the catalyst, diverse N-heteroaromatics, including benzotriazoles, purines, substituted benzimidazole, imidazole and pyrazole, reacted well with various D–A oxiranes, providing acyclic nucleoside analogues containing a N-glycosidic bond in
通过化学选择性的C-C键裂解,实现了带有N-杂芳族化合物的D–A肟基的第一个开环反应。在存在5 mol%的Y(OTf)3作为催化剂的情况下,各种N-杂芳族化合物,包括苯并三唑,嘌呤,取代的苯并咪唑,咪唑和吡唑,与各种D-A肟酯反应良好,提供了含有N的无环核苷类似物-糖苷键的产率高达97%,区域选择性高达> 95:5。通过简单的转化,也可以得到更昔洛韦类似物。