FeCl3 catalysed two consecutive aminomethylation at the α-position of the β-dicarbonyl compounds: an easy access to hexahydropyrimidines and its spiro analogues
作者:Chhanda Mukhopadhyay、Sunil Rana、Ray J. Butcher
DOI:10.1016/j.tetlet.2011.05.144
日期:2011.8
Multicomponent synthesis of 1,3-diaryl-hexahydropyrimidines by a one-pot reaction of 1,3-dicarbonyl compounds, amines and formaldehyde catalysed by FeCl3 in dichloromethane at room temperature (25–30 °C) has been reported. Double amino methylation occurs at the α-position of the 1,3-dicabonyl compounds/β-keto esters. The same methodology leads to spiro compounds with indane-1,3-dione. In this reaction
据报道,在室温(25–30°C)下,FeCl 3催化的二氯甲烷中的1,3-二羰基化合物,胺和甲醛的一锅反应可合成1,3-二芳基-六氢嘧啶。双氨基甲基化发生在1,3-二癸二烯基化合物/β-酮酯的α-位。相同的方法导致螺环化合物与茚满1,3-二酮。在该反应中,六个分子在一个罐中冷凝形成六个新的共价键,从而创造了高原子经济性。这是涉及β-酮酯及其螺环类似物与茚满-1,3-二酮的取代六氢嘧啶合成的首次报道。