The cyclocondensation of enones with aminoacetonitrile furnishes 3,4-dihydro-2H-pyrrole-2-carbonitriles which can be readily converted to 2,4-disubstituted pyrroles by microwave-induced dehydrocyanation. Alternatively, oxidation of the intermediates produces 3,5-disubstituted pyrrole-2-carbonitriles.
烯酮与
氨基乙腈的环缩合反应得到 3,4-dihydro-2H-pyrrole-2-carbonitriles,可通过微波诱导脱氢
氰化很容易地将其转化为 2,4-二取代的
吡咯。或者,中间体的氧化产生 3,5-二取代的
吡咯-2-腈。