A New Synthesis of 3,5-Diaryl-pyrrole-2-carboxylic Acids and Esters
作者:Imre Fejes、László Tőke、Gábor Blaskó、Miklós Nyerges、Chwang Siek Pak
DOI:10.1016/s0040-4020(00)00781-x
日期:2000.10
A new two-step synthesis of pyrrole-2-carboxylic acids, steps via 1,3 dipolar cycloaddition of azomethine ylides to nitro-styrenes and oxidation of the resulting pyrrolidines with alkaline hydrogen peroxide is described. The oxidation of cycloadducts 3 by the means of MnO2 under different conditions also has been examined.