作者:Patrick M. Jüstel、Alexandra Stan、Cedric D. Pignot、Armin R. Ofial
DOI:10.1002/chem.202103027
日期:2021.11.17
Ring, ring! The reactivity of spiro-activated electrophilic cyclopropanes was studied by following the kinetics of their SN2-type ring-opening reactions with thiophenolate ions in DMSO at 20 °C. The experimentally determined second-order rate constants (k2) correlated linearly with Mayr nucleophilicities N, basicities (pKaH), and Hammett substituent constants of the thiophenolates, but parabolic Hammett
响铃,响铃!通过跟踪螺环活化的亲电环丙烷在 20 °C 的 DMSO 中与苯硫酚离子的 S N 2 型开环反应的动力学,研究了螺环活化的亲电环丙烷的反应性。实验确定的二阶速率常数 ( k 2 ) 与迈尔亲核性N 、碱度 (p K aH ) 和苯硫酚盐的哈米特取代基常数线性相关,但抛物线哈米特图揭示了对转变稳定性的不同亲电子依赖性影响州。