Synthesis of l,2-dihydro-3<i>H</i>-pyrrolo[1,2-<i>a</i>]pyrrole-1-carboxylic acids and homologous pyridine and azepine analogues thereof
作者:Humberto Carpio、Edvige Galeazzi、Robert Greenhouse、Angel Guzmán、Esperanza Velarde、Yulia Antonio、Fidencio Franco、Alicia Leon、Virginia Pérez、Raquel Salas、David Valdés、Jack Ackrell、Diane Cho、Pasquale Gallegra、Otto Halpern、Richard Koehler、Michael L. Maddox、Joseph M. Muchowski、Anthony Prince、Derek Tegg、T. Craig Thurber、Albert R. Van Horn、Doug Wren
DOI:10.1139/v82-328
日期:1982.9.15
Several syntheses of the previously unknown 1,2-dihydro-3H-pyrrolo[1,2-a]pyrrole-1-carboxylic acid and various 5- and 6-substituted derivatives thereof have been devised. Some of these processes have been extended to the heretofore unreported 5,6,7,8-tetrahydropyrrolo[1,2-a]pyridine-8-carboxylic acid and 5,6,7,8-tetrahydro-9H-pyrrolo[1,2-a]azepine-9-carboxylic acid derivatives.Two new processes were
已经设计了多种先前未知的 1,2-二氢-3H-吡咯并[1,2-a]吡咯-1-羧酸及其各种 5-和 6-取代衍生物的合成方法。其中一些过程已经扩展到迄今为止未报道的 5,6,7,8-四氢吡咯并[1,2-a]吡啶-8-羧酸和5,6,7,8-四氢-9H-吡咯并[1, 2-a]氮杂-9-羧酸衍生物。开发了两种将吡咯转化为相应吡咯-2-乙酸酯的新工艺。这两种方法都基于使用容易获得的乙二酰吡咯衍生物作为起始材料。一个序列涉及α-酮酯的皂化,然后是粗α-酮酸盐的Wolff-Kishner 还原和随后由此产生的乙酸衍生物的酯化。