Synthesis, thermal reactivity, and kinetics of stabilized phosphorus ylides, part 2: [(Arylcarbamoyl)(cyano)methylene]triphenylphosphoranes and their thiocarbamoyl analogues
作者:R. Alan Aitken、Nouria A. Al-Awadi、Osman M. E. El-Dusouqui、Dorcas M. M. Farrell、Ajith Kumar
DOI:10.1002/kin.20170
日期:2006.8
A series of five cyano(arylcarbamoyl) phosphorus ylides 2 and five cyano(arylthiocarbamoyl) phosphorus ylides 3 are prepared and fully characterized. Pyrolytic reaction products of a representative example of each type obtained by flash vacuum pyrolysis technique show that they undergo thermal extrusion of Ph3PO or Ph3PS. Kinetic study of the gas-phase pyrolysis of each ylide by static method shows
制备并充分表征了一系列五氰基(芳基氨基甲酰基)磷叶立德2和五氰基(芳硫代氨基甲酰基)磷叶立德3。通过闪蒸真空热解技术获得的每种类型的代表性实例的热解反应产物表明它们经历了Ph3PO或Ph3PS的热挤压。通过静态方法对每种叶立德气相热解的动力学研究表明,这些反应是单分子一级一级反应,没有明显的取代基效应,但硫代氨基甲酰基叶立德 3 的反应速度比其氨基甲酰基类似物 2 快 40-65 倍。 © 2006 Wiley Periodicals, Inc. Int J Chem Kinet 38: 496–502, 2006