Copper(I) Bromide-Mediated Synthesis of Novel 2-Arylthiazole-5-carboxylates from α-Diazo-β-Keto Esters and Aromatic Thioamides
作者:Xavier Fontrodona、Santiago Díaz、Anthony Linden、José M. Villalgordo
DOI:10.1055/s-2001-17697
日期:——
aromatic primary thioamides 9 and 14, a simple synthesis of 2- aryl 4-substituted thiazole-5-carboxylate derivatives of type 10 and 16 has been accomplished. The method is based on the efficient ca- talysis of CuBr, which promotes the formation of the corresponding carbenoids 11 from diazo derivatives 8. These Cu-carbenoids 11 re- act with the thiocarbonyl group of the primary thioamides to afford presumably
从容易获得的-重氮--酮酯8和芳族伯硫代酰胺9和14开始,已经完成了10和16型2-芳基4-取代噻唑-5-羧酸酯衍生物的简单合成。该方法基于 CuBr 的有效催化,它促进了从重氮衍生物 8 中形成相应的类卡宾化合物 11。这些 Cu-类卡宾化合物 11 与伯硫代酰胺的硫代羰基反应,可能提供一般的中间体12 型,其通过随后的环缩合提供标题噻唑衍生物。