Preparation of pyrrolin-2-ones and 4,5-dihydrodipyrrin-1-ones by oxidation of α-formylpyrroles and α-formyldipyrromethanes with hydrogen peroxide
作者:Clotilde Pichon-Santander、A.Ian Scott
DOI:10.1016/s0040-4039(00)00272-0
日期:2000.4
Various substituted α-formylpyrroles and -dipyrromethanes have been oxidized by hydrogen peroxide under mild conditions to give pyrrolin-2-ones (2) and 4,5-dihydrodipyrrin-1-ones (4) with concomitant loss of the formyl substituent, thus extending the scope of this oxidation to dipyrromethanes. This makes the reaction especially useful for the preparation of bile pigments, for which the pyrrolinones
在温和的条件下,过氧化氢已氧化了各种取代的α-甲酰基吡咯和-dipyrroro甲烷,生成了吡咯烷-2-酮(2)和4,5-二氢联吡啶-1-酮(4),同时甲酰基取代基也因此丢失,从而扩展了氧化为二吡咯甲烷的范围。这使得该反应对于胆汁颜料的制备特别有用,对于该胆汁颜料,吡咯烷酮和4,5-二氢二吡咯烷酮构成重要的合成子。