Pyrolysis of 4-aryl-5-morpholino-4,5-dihydrotriazoles 3 affords two products: pyrano[4,3-b]pyrrol-4(1H)-ones 4 and arylacetamidines 5. The reaction mechanism of this transformation is discussed and reaction conditions optimized to enhance the formation of pyrrole-fused pyran-2-one derivatives 4. 2-Aminoaziridines are considered to be key intermediates in this transformation.
4-芳基-5-吗啉代-4,5-二氢三唑 3 的热解得到两种产物:
吡喃并[4,3-b]
吡咯-4(1H)-酮 4 和芳基
乙脒 5。讨论了该转化的反应机理并优化反应条件以增强
吡咯稠合
吡喃-2-酮衍
生物4的形成。2-
氨基
氮丙啶被认为是该转化中的关键中间体。