These reactions occur in the case of open-chain compounds as acetoacetic ester, brnzoylacetic ester, cyanoacetic ester, malonic ester and desoxybenzoin; also heterocyclic compounds as thiazolidones, pyrazolones, isoxazolones and imidazolones are similarly reactive. The present investigation was carried out with methylene derivatives in which one group was a benzoyl or substituted benzoyl grouping and the other the CN, SCN or P-CH ...
