Kinetic solvent isotope effect and proton inventory study of the carbon protonation of amine adducts of benzylidene Meldrum's acid and other Meldrum's acid derivatives. Evidence for concerted intramolecular proton transfer
The nitro anomaly and Br�nsted ?nuc values inSN2 reactions on chlorine
作者:Linoam Eliad、Shmaryahu Hoz
DOI:10.1002/poc.482
日期:2002.8
The kinetics of chlorine transfer reactions between N-chlorosuccinimide (NCS) and four carbon nucleophiles (the conjugated bases of phenyldinitromethane, Meldrum's acid, phenylmalononitrile and phenylnitro-methane) in water were determined. A plot of log k for the SN2 reactions vs the pKa of the first three conjugated acids of the nucleophiles gave a straight line with a slope (βnuc) of 1.8. The data
Synthesis of branched-chain cyclitols using a palladium(0)-catalysed allylic coupling reaction
作者:Derek H.R Barton、Peter Dalko、Stephan D Gero
DOI:10.1016/s0040-4039(00)74357-7
日期:1991.11
A carbanion derived from Meldrum's acid was used in a palladium(O)-catalysed allylic substitution reaction to prepare stereospecifically branched-chain cyclitols from the symmetrical 1,2,3,4,-tetraacetoxycyclohex-5-ene (4).
Nucleophilic addition to olefins. 4. Structure-reactivity relationships in the reactions of amines with substituted benzylidene Meldrum's acids. Evidence for intramolecular proton transfer to carbon