With only carbon-to-carbon double bonds as unsaturation (C07C47/21)

C   Chemistry; metallurgy(315834)
C07   Organic chemistry(61593)
C07C47        Compounds having ; cho groups(815)
C07C47/21                     With only carbon-to-carbon double bonds as unsaturation(54)

ethod for producing geranial // 2579122
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing geranial, which is used in perfumery as flavouring agents and perfumes, of a mixture of isomers geranial and neral (citral). Method is based on carrying out transformations citral in the presence of acid catalysts, preferably, Montmorillonite clay, leading to preferred expenditure neral by formation of oligomers, and indent geranial′ unaffected. Separation of geranial from the reaction mixture can be performed column chromatography or by distillation at low pressure.EFFECT: proposed method allows to obtain an end product using simple and efficient technology on the basis of available and cheap citral.1 cl, 5 ex
Catalyst and method of obtaining branched unsaturated aldehydes // 2545069
FIELD: chemistry.SUBSTANCE: claimed invention relates to continuous method of obtaining branched unsaturated aldehydes, which can be used for obtaining branched alcohols or acids. method includes preparation of raw material, containing from 5 to 90 wt % of Cn aldehyde, in which n equals from 3 to 8, with raw material additionally containing from 10 to 95 wt % of solvent, interaction of raw material with resin, with resin containing acidic functional groups and not containing a metal from group VIII; reaction of mixture with resin with obtaining effluent flow, containing from 5 to 99.99 wt % of branched unsaturated C2n aldehyde and characterised by reaction selectivity constituting not less than 92%, with formation of branched unsaturated C2n aldehyde; removal of at least part of branched unsaturated C2n aldehyde from effluent flow; and optionally recirculation of part of effluent flow for re-use in raw material. Invention also relates to system for claimed method realisation.EFFECT: elaboration of continuous method of obtaining branched unsaturated aldehydes.12 cl, 1 tbl, 6 ex

Specific branched aldehydes, alcohols, surfactants and consumer products based thereon // 2532165
FIELD: chemistry.SUBSTANCE: invention relates to a novel acyclic aldehyde having 16 carbon atoms, containing at least three branches and selected from a group consisting of: 3-ethyl-7,11-dimethyldodecanal, 2,3,7,11-tetramethyl-dodecanal, 7,11,-dimethyl-3-vinyldodeca-6,10-dienal and 4,8,12-dimethyltrideca-4,7,11-trienal, to a composition of substances suitable for use as starting material for producing surfactants and containing at least one of the disclosed acyclic aldehydes, to a composition of detergent alcohols, suitable for producing a composition of surfactants and containing at least one acyclic alcohol converted from the disclosed acyclic aldehyde, and to a surfactant composition suitable for use in a detergent or cleaning composition and containing one or more surfactant derivatives of isomers of the acyclic detergent alcohol converted from the disclosed acyclic aldehyde. The invention also relates to versions of a cleaning composition and to versions of a method of producing an alcohol mixture for a composition of detergent alcohols.EFFECT: improved properties of compounds.19 cl, 10 tbl, 24 ex

Novel fragrant compounds, sythesis method and application thereof // 2412149
FIELD: chemistry.SUBSTANCE: invention relates to novel compounds of general formula (I), in which X denotes a CHO, CH2OH or CH2OC(O)R group, where R denotes a straight of branched C1-C5 alkyl chain; as well as to a synthesis method, particularly synthesis of 6,8-dimethylnon-7-enal (1) through hydroformylation of 5,7-dimethylocta-1,6-diene. The invention also relates to fragrant compositions containing formula (I) compounds. Owing to their fragrant properties, these compounds are of great interest in perfumery, particularly cosmetic products and household chemicals.EFFECT: obtaining novel fragrant compositions.12 cl, 7 ex

Cis/trans-citral and (iso)piperitonole process // 2357949
FIELD: chemistry.SUBSTANCE: invention refers to cis/trans-citral and (iso)piperitenole processes to be then used in perfumery, household chemicals, vitamin synthesis. The process involves isomerisation of cis-trans verbenol in supercritical lower alcoholic vehicles (C1-C3) at temperature 420°C and lower. As a rule, supercritical lower alcoholic vehicles include supercritical methyl or ethyl alcohol, or supercritical 1-propanol. Commonly thermal isomerisation is ensured at temperature 280-420°C and pressure 100-120 atm.EFFECT: high yield end products with controlled selectivity and high reaction time.6 cl, 1 tbl, 2 dwg, 3 ex

The method of producing citral // 2091364
The invention relates to an improved process for the preparation of citral, which is a mixture of CIS-and TRANS-isomers of 3,7-dimethylocta-2,6-dienes, which is widely used for the production of high-value components of perfumes and high-quality cosmetic and perfumery products, in particular lineolata, geranylacetone, linalool, geraniol, citronellol, Ivanov and so on, used in the synthesis of vitamins a and E