作者:Hashim F. Motiwala、Manwika Charaschanya、Victor W. Day、Jeffrey Aubé
DOI:10.1021/acs.joc.5b02764
日期:2016.2.19
The effect of carrying out two variations of the Schmidt reaction with ketone electrophiles in hexafluoroisopropanol (HFIP) solvent has been studied. When TMSN3 is reacted with ketones in the presence of triflic acid (TfOH) promoter, tetrazoles are obtained as the major products. This observation is in contrast to established methods, which usually lead to amides or lactams arising from formal NH insertion
研究了在六氟异丙醇(HFIP)溶剂中与酮亲电试剂进行Schmidt反应的两种变化的效果。当TMSN 3在三氟甲磺酸(TfOH)促进剂的存在下,使酮与酮反应,得到四唑为主要产物。该观察结果与已建立的方法相反,已建立的方法通常导致正式NH插入作为主要产物而产生酰胺或内酰胺。还报道了该反应的几个实例的全部产物概况,发现其包括机械上令人感兴趣的产物(例如,双环膨胀)。还发现在HFIP中使用TfOH促进剂可以促进羟烷基叠氮化物与酮的反应,与最初报道的方法相比,在亲核打开初始形成的亚胺醚后,内酰胺得到内酰胺的效率更高。