Elimination–addition. Part XI. Electronic effects upon the reactivity of aryl vinyl sulphones towards amines
作者:S. T. McDowell、C. J. M. Stirling
DOI:10.1039/j29670000348
日期:——
Rates of addition of t-butylamine to a series of nuclear-substituted aryl vinyl sulphones have been measured for reactions in ethanol at 25°. The results are well correlated by the Hammett σρ relationship, the value of ρ=+1·59 being obtained with substituents possessing σ constants in the range –0·268 to +0·778. The reaction is compared with others which proceed via a carbanionic transition state.
对于在乙醇中在25°下的反应,已经测量了叔丁胺向一系列核取代的芳基乙烯基砜中的加成率。通过Hammettσρ关系可以很好地关联结果,其中ρ= + 1·59的值是由具有介于–0·268至+ 0·778范围内的σ常数的取代基获得的。将反应与通过碳负离子过渡态进行的其他反应进行比较。