A novel Cu(II)-catalyzed cyclization of alpha-diazo-beta-oxoamides with amines has been developed, constituting a straightforward method to construct pyrrol-3(2H)-one rings. The intramolecular hydrogen bonding effect in alpha-diazo-beta-oxoamides plays an essential role in this reaction. A plausible reaction mechanism involving divergent generation and subsequent [2 + 3] cyclization of ketene and alpha-diazoimine
已开发出一种新型的
铜(II)催化与
胺类的α-重氮-β-氧代酰胺环化反应,构成了构建
吡咯-3(2H)-一环的直接方法。α-重氮-β-氧代酰胺中的分子内氢键作用在该反应中起重要作用。提出了一种合理的反应机理,涉及发散的产生以及随后的[2 + 3]烯酮和α-重氮
亚胺中间体的环化。