A variety of acetamide derivatives are reduced in excellent yields to tertiary amines by PhMeSiH2 in the presence of Cp2TiX2 (X = F or Me) catalysts. The reactions are very clean at 80 °C. At room temperature a secondary reaction, hydrogenolysis of the C(O)N bond, intervenes and reduces the chemoselectivity. Nevertheless, this chemistry provides a simple methodology for the amide/alkylamine transformation using inexpensive, commercially available reagents.Key words: amides, reduction, secondary amides, methylphenylsilane, titanocene, catalysis.
一种多样的乙酰胺衍
生物在PhMeSiH
2存在下与Cp
2TiX
2(X = F或Me)催化剂反应,以优异的产率还原为三级胺。这些反应在80°C下非常干净。在室温下,发生了C(O)N键的次级反应,氢解作用介入并降低了
化学选择性。尽管如此,这种
化学方法提供了一种简单的方法,利用廉价、易获得的试剂进行酰胺/烷胺转化。关键词:酰胺、还原、次级酰胺、甲基苯基
硅烷、二茂
钛、催化。