Hydroxylic additives enhance yield and scalability of silicon-directed Nazarov reaction
作者:Shaon Joy、Waka Nakanishi、F.G. West
DOI:10.1016/j.tetlet.2013.07.139
日期:2013.10
As a result of difficulties in scaling up silicon-directed Nazarov cyclization for use in the synthesis of taxane natural products, the effect of additives was examined. Hydroxylic additives were found to convey a consistent beneficial effect on the rate, overall yield, and scalability of these reactions. Optimal conditions (1.5 equiv methanol or water with substoichiometric FeCl3), were successfully
由于难以扩大用于合成紫杉烷天然产物的硅定向Nazarov环化的规模,因此研究了添加剂的作用。发现羟基添加剂对这些反应的速率,总产率和可扩展性具有一致的有益作用。最佳条件(1.5当量甲醇或水和亚化学计量的FeCl 3)已成功应用于一系列β-甲硅烷基二烯酮底物,包括几个复杂的多环实例,以及较简单的二烯酮(以前显示在此条件下产率低或完全不反应)。常规条件。