The effect of strain on reactivity: poor leaving groups increase strain-induced inhibition of alkene-forming elimination
作者:Luca Volta、Charles J. M. Stirling
DOI:10.1039/a807506i
日期:——
Elimination to form a carbon–carbon double bond exocyclic to a cyclopropane ring is inhibited by factors which increase from 1.4 to 104.5 as the leaving group becomes poorer; strain induced in the transition structure can amount to some 50% of the enthalpy difference between strained and unstrained products.
Methylenecyclopropanes in Elimination and Addition Reactions: Quantification of the Effects of Strain
作者:Luca Volta、Charles J. M. Stirling
DOI:10.1080/10426500902947856
日期:2009.6.23
The effect of strain in 1,2-elimination reactions that form methylenecyclopropanes has been evaluated for a series of leaving groups. The worse the leaving group, the greater is the inhibitory effect of strain build-up, which reaches 50% of the excess enthalpy differential for the poorest leaving group studied. In nucleophilic addition to an electrophilic methylenecyclopropane, comparison of strained