A green approach for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones (and -thiones) using N,N-diethyl-N-sulfoethanaminium hydrogen sulfate
作者:Abdolkarim Zare、Zahra Nasouri
DOI:10.1016/j.molliq.2016.01.056
日期:2016.4
synthesized, and characterized by studying its FT-IR, 1H NMR, 13C NMR and mass spectra. Afterward, catalytic activity of the Brønsted acidic ionic liquid has been examined for the preparation of 3,4-dihydropyrimidin-2-(1H)-ones and 3,4-dihydropyrimidin-2-(1H)-thiones via the one-pot multi-component reaction between arylaldehydes, β-ketoesters and urea (or -thiourea) under solvent-free conditions. The
本文合成了一种新型的含SO 3 H的离子液体,即N,N-二乙基-N-磺基硫代硫酸氢铵([Et 3 N–SO 3 H] HSO 4),并对其FT-IR进行了表征。 ,1 H NMR,13 C NMR和质谱。此后,已经检查了布朗斯台德酸性离子液体的催化活性,用于通过以下方法制备3,4-二氢嘧啶-2-(1 H)-酮和3,4-二氢嘧啶-2-(1 H)-硫酮。在无溶剂条件下,芳基醛,β-酮酸酯与尿素(或-硫脲)之间的一锅多组分反应。结果表明,[Et 3 N–SO 3 H] HSO 4是该反应的高效催化剂。