Multicomponent Reactions of Phosphines, Diynedioates, and Aryl Aldehydes Generated Furans Appending Reactive Phosphorus Ylides through Cumulated Trienoates as Key Intermediates: A Phosphine α-Addition-δ-Evolvement of an Anion Pathway
作者:Jie-Cheng Deng、Shih-Ching Chuang
DOI:10.1021/ol502879c
日期:2014.11.7
Multicomponent reactions of phosphines, diynedioates, and aryl aldehydes have been demonstrated, providing trisubstituted furans appending reactive phosphorus ylides, through cumulated trienoates as key intermediates. The proposed trienoate intermediates, 1,5-dipolar species formed via nucleophilic α-attack of phosphines toward diynedioates (α-addition-δ-evolvement of an anion, abbreviated αAδE), undergo
已经证明了膦,二炔基和芳基醛的多组分反应,通过累积的三烯酸酯作为关键中间体,提供了附有反应性磷酰化物的三取代呋喃。拟议的trienoate中间体,通过膦的亲核α-攻击向二炔(阴离子的α-加成-δ-演变,缩写为αAδE)形成的1,5-偶极物质,经过芳基醛加成之后进行5 - endo -dig环化,质子转移和共振产生三取代的呋喃。此外,磷酰化物被氧化成α-酮酯呋喃,并用作维蒂希试剂。