Sequential Double Olefination of 2-(Arylmethylidene)-2-phosphonoacetonitrile with Dimsyl Lithium and Aldehydes: A Domino Route to Densely Substituted 1,3-Butadienes
作者:Raghunath Chowdhury、Sunil K. Ghosh
DOI:10.1002/ejoc.200800385
日期:2008.8
stereoselective synthesis of densely substituted 1,3-dienes has been achieved which entails a sequential double olefination of 2-(arylmethylidene)-2-phosphonoacetonitriles by a one-pot domino process involving Michaeladdition of dimsyllithium to 2-(arylmethylidene)-2-phosphonoacetonitrile, Horner–Wadsworth–Emmons reaction of the resulting phosphonate ylide with the added aldehyde followed by base induced
Synthesis of cyclopent-1-enecarbonitriles <i>via</i> a tandem Giese/HWE reaction initiated by visible light
作者:Marek Moczulski、Dariusz Deredas、Elżbieta Kuśmierek、Łukasz Albrecht、Anna Albrecht
DOI:10.1039/d2cc06543f
日期:——
In the manuscript, a novel method for the preparation of cyclopent-1-enecarbonitriles viatandem Giese/HWE reactioninitiated by visible light in the presence of fac-Ir(ppy)3 as a photocatyst has been described. The cascade reactivity combining radical and polar processes has proven applicable for a wide range of N-(acyloxy)phthalimides (which serve as precursors of the corresponding radicals) as well