Multicomponent formation route to a new class of oxygen-based 1,3-dipoles and the modular synthesis of furans
作者:Huseyin Erguven、Cuihan Zhou、Bruce A. Arndtsen
DOI:10.1039/d1sc04088j
日期:——
generated by the multicomponent reaction of aldehydes, acid chlorides and the phosphonite PhP(catechyl). These 1,3-dipoles are formally cyclic tautomers of simple Wittig-type ylides, where the angle strain and moderate nucleophilicity in the catechyl-phosphonite favor their cyclization and also direct 1,3-dipolar cycloaddition to afford single regioisomers of substituted products. Coupling the generation
通过醛、酰氯和亚膦酸酯 PhP(儿茶基)的多组分反应,可以生成一类新的含磷 1,3-偶极子。这些 1,3-偶极子是简单 Wittig 型叶立德的形式上的环状互变异构体,其中儿茶基-亚膦酸酯中的角应变和适度的亲核性有利于它们的环化,并且还直接进行 1,3-偶极环加成以提供取代产物的单一区域异构体。偶极子的产生与 1,3-偶极环加成相结合,提供了一种独特的模块化途径,从可用醛、酰氯和炔烃的组合中获得呋喃,并独立控制所有四个取代基。