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。