A general and practical route for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones by a one-pot condensation of aldehydes, β-ketoesters, and urea is described using trimethylsilyltriflate (1 mol%)-mediated cyclocondensation reaction at room temperature within 15 minutes. Yields are significantly higher than utilizing classical Biginelli reaction conditions. Synthesis of mitotic Kinesin Eg5 inhibitor monastrol has been achieved in 95% isolated yield.
本文描述了一种通用且实用的合成3,4-二氢
嘧啶-2(1H)-酮的方法,通过在室温下使用三甲基
硅基三
氟醋酸酯(1 mol%)介导的环状缩合反应将醛、β-
酮酯和
脲一次性缩合反应,反应时间为15分钟。与经典的Biginelli反应条件相比,产率显著提高。已经成功合成了有丝分裂动力蛋白Eg5
抑制剂monastrol,分离产率高达95%。