- Cyclization of citronellal in a supercritical solvent in a flow reactor in the presence of Al2O3
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The reactivity of citronellal under supercritical solvent conditions in a flow reactor in the presence of Al2O3 is examined. It is shown that at 160°C, the main transformation product of citronellal is isopulegol, and when the temperature is increased to 190°C, they are monoterpenes with a para-menthane framework and myrcene. Pleiades Publishing, Ltd., 2012.
- Anikeev,Il'Ina,Volcho,Salakhutdinov
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p. 1917 - 1919
(2013/01/15)
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- Dimethyl-(4-methyl-1-cyclohexenyl)methyl and 2-(1-methylethylidene)-5- methylcyclohexyl ethers from pulegone
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NaBH4 reduction of pulegone (1) in short chain alcohols followed by acidification of the reaction mixture gives dimethyl-(4-methyl-1- cyclohexenyl) ethers. Acid catalyzed transetherification of these ethers in longer chain alcohols yields mixtures of the title compounds.
- Spencer
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p. 1603 - 1615
(2007/10/02)
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- Thermodynamics of the Isomerisation of the p-Menthadienes and the Additivity of the Properties of Cyclic Hydrocarbons
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We have studied the equilibria and obtained the thermodynamic parameters for the isomerisation of nine p-menthadienes in the range 225-350 deg C.An approach has been proposed and shown to be effective for the additive calculation of the properties of aliphatic hydrocarbons: this is based on the introduction of additional effective characteristics for an atom which take into account its participation in the ring system of the molecule.
- Kabo, G. Ya.,Roganov, G. N.,Filippenko, Z. A.
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p. 1521 - 1522
(2007/10/02)
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- ISOMERIZATION EQUILIBRIUM OF THE p-MENTHADIENES IN THE VAPOR PHASE
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The isomerization equilibrium between nine p-menthadienes has been studied in the vapor phase at 250 deg C and their equilibrium ratios have been determined.A method for the quantitative GLC analysis of mixtures of isomeric p-menthadienes has been developed.
- Filippenko, Z. A.,Baranov, O. M.,Roganov, G. N.,Kabo, G. Ya.
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- TRANSFORMATIONS OF p-MENTHADIENES UNDER THE ACTION OF POTASSIUM tert-BUTANOLATE IN DIMETHYL SULFOXIDE
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The products of the transformation of α- and γ-terpinenes, terpinolene, (+)-trans-isolimonene, and (+)-limonene under the action of potassium tert-butanolate in dimethyl sulfoxide contained - in addition to the α- and γ-terpinenes, isoterpinolene, p-mentha-3,8-diene and p-cymene found previously - terpinolene, α- and β-phellandrenes, p-mentha-2,4-diene (in total amount of 1-3percent), and polymers.Under these conditions, limonene is racemized.The primary products of the isomerization reaction have been identified.A supplementary scheme for the isomerization transformations of p-menthadienes is presented.
- Buinova, E. F.,Urbanovich, T. R.,Udarov, B. G.,Izotova, L. V.
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p. 555 - 559
(2007/10/02)
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- Chemistry of the 2-Pinanols. 2. Investigation of the Utility of the Enhanced Basicities of the Pinanoxide Bases
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The utility of the alkoxides of cis- and trans-2-pinanol has been investigated.Yiels comparable to and exceeding those obtained with tert-butoxide are reported for the alkylation of ethyl acetoacetate, for the conversion of α-pinene oxide to trans-pinocarveol and cis-3-pinen-2-ol, and for the isomerization of vinylnorbornene and limonene.Dehydrohalogenation was effected rapidly on bornyl chloride and 2,6-dichlorocamphane-compounds reported to be inert to potassium tert-butoxide in tert-butyl alcohol.Reactions with 1-octyl bromide and with benzyl chloride showed that the pinanoxides have nucleophilicities comparable to that of tert-butoxide.
- Traynor, Sean G.,Kane, Bernard J.,Coleman, Jacquelyn B.,Cardenas, Carlos G.
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p. 900 - 906
(2007/10/02)
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- Terpene hydroxysulfonic acids and corresponding hydroxysulfonate salts
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Optically active terpene hydroxysulfonate salts are made by sulfonating an optically active terpene epoxide of the p-menthane family, with a sulfonating agent selected from a sulfite, a bisulfite, or a thiosulfate.
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