作者:Hamish McNab、Lawrence Hill、S. Imam、William O’Neill
DOI:10.1055/s-0029-1217422
日期:2009.8
sulfoxide solution, and predominantly as the keto tautomer in water. 3-Hydroxy-1H-pyrrole reacts readily with mild electrophiles, exclusively at the 2-position. FVP of the product obtained from one such reaction with methoxymethylene-substituted Meldrum’s acid gives pyrano[3,2-b]pyrrol-5(1H)-one in 77% yield. gas-phase reactions - heterocycles - pyrroles - electrophilic aromatic substitutions - tautomerism
于600˚C进行的叔丁基[((2,2-二甲基-4,6-dioxo-1,3-dioxan-5-yylne)methyl] amino} acetate的快速真空热解(FVP)得到不稳定的3-羟基约-1 H-吡咯 唯一有意义的产品是55%的产率。它在二甲基亚砜溶液中以烯醇式互变异构体的形式存在,在水中以酮基互变异构体的形式存在。3-Hydroxy-1 H-吡咯仅在2位容易与温和的亲电试剂反应。通过与甲氧基亚甲基取代的麦德鲁姆酸的一种这样的反应获得的产物的FVP以77%的产率得到吡喃并[3,2 - b ]吡咯-5(1H)-一。 气相反应-杂环-吡咯-亲电子取代-互变异构