Direct Intermolecular C–H Functionalization Triggered by 1,5-Hydride Shift: Access to <i>N</i>-Arylprolinamides via Ugi-Type Reaction
作者:Le Zhen、Jiankun Wang、Qing-Long Xu、Hongbin Sun、Xiaoan Wen、Guangji Wang
DOI:10.1021/acs.orglett.7b00378
日期:2017.4.7
yields. This is an example of a two starting material–three component reaction. The benzyl alcohol substrate 1 acts as a dual synthon, which upon treatment with a Brønsted acid affords iminium ion and water. Nucleophilic attack at the iminium ion by the third component isocyanide, followed by hydrolysis with the endogenic water, gives the Ugi-type reaction products. The reaction proceeds under mild conditions
已经建立了一种由1,5-氢化物转移引发的新型Ugi型反应,可以高原子经济性和高收率获得N-芳基脯氨酰胺和相关化合物。这是两种原料-三组分反应的一个例子。苯甲醇底物1充当双重合成子,用布朗斯台德酸处理后得到亚氨基离子和水。第三组分异氰对亚胺离子的亲核攻击,然后用内生水水解,得到Ugi型反应产物。该反应在温和的条件下进行,可耐受多种底物。