The feeble nucleofugality of a nitronate leaving group and its enhancement by ring strain
作者:Pier Paolo Piras、Patsy J. Thomas、Charles J. M. Stirling
DOI:10.1039/c39820000658
日期:——
The rank of a nitronate ion in activated alkene-forming elimination is low (+2.6); incorporation of the leaving goup in a cyclopropane accelerates elimination so much that the (ElcB)R–(ElcB)I borderline is traversed but the retro-Thorpe–Ingold effect nevertheless operates.
在形成活化烯烃的消除中,亚硝酸根离子的等级较低(+2.6);在环丙烷中加入离去基团可加快消除速度,以至于可以越过(E l cB)R –(E l cB)I边界,但仍会产生逆向索普-英戈尔德(Thorpe-Ingold)效应。