A Direct Synthesis of Substituted Exocyclic 1<i>H</i>‐pyrrol‐3(2<i>H</i>)‐ones by Base‐Mediated Multicomponent [3+2] Cycloaddition
作者:Ganesh P. Pawar、Hong Ren Chen、Indrajeet J. Barve、Li‐Ching Shen、Chung‐Ming Sun
DOI:10.1002/adsc.202301245
日期:2024.2.19
A one-pot, three-component, base-mediated [3+2] cycloaddition reaction to synthesize 1H-pyrrol-3(2H)-ones from readily available amino acid esters, aldehydes, and terminal alkynes was reported. Isolation of the intermediate and the detailed mechanistic study revealed the course of the reaction. This multi-component reaction proceeds via imine formation followed by the nucleophilic addition of alkyne
报道了一种一锅、三组分、碱介导的[3+2]环加成反应,从容易获得的氨基酸酯、醛和末端炔合成1H-吡咯-3(2H ) -酮。中间体的分离和详细的机理研究揭示了反应过程。这种多组分反应通过亚胺形成、随后炔烃的亲核加成形成炔丙胺前体来进行。炔丙胺前体经碱介导转化为 1-氮杂二烯,随后原位乙烯酮形成,导致 [3+2] 环加成,最终产生不寻常的 1 H -吡咯-3(2 H )-酮。