Nucleophilic heterocyclic carbene promoted one pot multicomponent synthesis of new 6-(1H-indol-3-yl)-2-oxo-4-aryl-1,2,3,4 tetrahydropyrimidine-5-carbonitriles: an eco-compatible approach with PEG as a biodegradable medium
作者:Shahin Fatma、Divya Singh、Priya Mishra、Pravin K. Singh、Preyas Ankit、Mandavi Singh、J. Singh
DOI:10.1039/c3ra43606c
日期:——
A three-component, one-pot, simple, direct and highly efficient cyclocondensation method has been developed for the synthesis of fourteen 6-(1H-indol-3-yl)-2-oxo-4-aryl-1,2,3,4-tetrahydropyrimidine-5-carbonitriles by combining an arylaldehyde with 3-(cyanoacetyl)-indoles and urea in the presence of the PEG-400 and a catalytic amount of the thiazolium anion. A short reaction time, simple reaction conditions, ease of product isolation, use of a cheap and readily available and reusable catalyst make this method very attractive from an environmental and economic perspective.
一种三组分、一锅法、简单、直接且高效的环缩合方法已被开发,用于合成十四种6-(1H-indol-3-yl)-2-氧基-4-芳基-1,2,3,4-四氢嘧啶-5-氰基化合物。该方法通过将芳 aldehyde、3-(氰乙酰基)-吲哚和尿素结合在一起,在PEG-400和少量噻唑阳离子的催化下进行反应。反应时间短、反应条件简单、产品分离容易、使用廉价且易得且可重复使用的催化剂,使得该方法在环境和经济方面都非常有吸引力。