Elimination and addition reactions. Part 32. Discrimination between concerted and stepwise processes in activated elimination reactions
作者:Donald R. Marshall、Patsy J. Thomas、Charles J. M. Stirling
DOI:10.1039/p29770001914
日期:——
In 1,2-elimination reactions activated by phenylsulphonyl, cyano, and benzoyl groups with leaving groups SO2Ph, SPh, and OPh, comparison of ionisation rates with elimination rates confirms that the (E1cB)R mechanism operates in the sulphonyl and cyano activation series but in the benzoyl series the mechanism for all leaving groups is (E1cB)I. This difference in behaviour is discussed.
在苯磺酰基,氰基和苯甲酰基与SO 2 Ph,SPh和OPh离去基团激活的1,2-消除反应中,电离速率与消除速率的比较证实,(E 1 cB)R机理在磺酰基和氰基活化系列,但在苯甲酰基系列中,所有离去基团的机理为(E 1 cB)I。讨论了这种行为上的差异。