Studies in decarboxylation. Part VI. A comparison of the transition states for the decarboxylation of β-keto- and βγ-unsaturated acids
作者:D. B. Bigley、J. C. Thurman
DOI:10.1039/j29680000436
日期:——
The effect of substituents on the rate of thermal decarboxylation of βγ-unsaturated acids is compared to their effect on the decarboxylation of β-keto-acids. From the close similarity observed, it is argued that the reactions have nearly identical transition states. It is demonstrated that the transition state for the olefinic acids is largely non-polar; by analogy, the keto-acids are concluded to
将取代基对β- γ-不饱和酸的热脱羧速率的影响与其对β-酮酸的脱羧的影响进行比较。从观察到的相似性来看,认为反应具有几乎相同的过渡态。已经证明,烯酸的过渡态在很大程度上是非极性的。通过类推,得出酮酸通过很大程度上非极性的机理脱羧。关于β-酮酸脱羧的更早的论点得到了严格的审查。