1337968-38-3Relevant articles and documents
Kinetic Patterns of Condensation of Alkyl- and Cycloalkylcyclopentanones with Dihydric Alcohols in the Presence of Polyoxomolybdate Modified with Oxides of Rare-Earth Elements
Alimardanov, Kh. M.,Velieva,Dadashova
, p. 1882 - 1889 (2018)
The results of condensation of C5–C7 alkyl- and cycloalkyl-substituted cyclopentanones with diatomic vicinal alcohols in the presence of polyoxomolybdate modified with gadolinium oxide are considered. Kinetic patterns are investigated and a kinetic model of the process is proposed. It was established that alkyl- and cycloalkyl derivatives of dioxaspironone are formed directly by two parallel-consecutive routes and through the stages of the preparation of the corresponding hemiacetal. The ratio of the rate constants of these routes depends on the composition and structure of the starting ketones and diols.
Synthesis of higher spiroacetals by condensation of alkyl- and cycloalkylcyclopentanones and cyclohexanones with dihydric alcohols in the presence of heterogenic catalysts
Alimardanov, Kh.M.,Sadygov,Abbasov,Suleimanova,Dzhafarova,Abdullaeva, M.Ya.,Abbasova
experimental part, p. 1153 - 1160 (2011/12/01)
The condensation of C3-C7 alkyl- and cycloalkylcyclopentanones and cyclohexanones with 1,2-ethane-, 1,2-propane-, and 1,3-butanediols in the presence of heterogenic acid catalysts provided new representatives of spiroacetals. The highest yields of reaction products were obtained in the presence of phosphomolybdic heteropolyacid additionally modifi ed with cobalt and bromine, and also in the presence of the chlorinated cationite KU-23 at 110-130°C. The synthesized spiroacetals possess the jasmine and menthol-wooden fragrance of various tinges.
