摘要:
Alkyl-substituted butenols having the formula (I): R1—CH2—CH═CR2—CH2OH (I) wherein R1 is a saturated or olefinically unsaturated alkyl or cycloalkyl group having from 4 to 16 carbon atoms and wherein R1 is optionally substituted by an alkyl, cycloalkyl, aryl or alkaryl having up to 12 carbon atoms; R2 is hydrogen or an alkyl group having from 1 to about 6 carbon atoms are produced by a process which comprises: (1) reacting an aldehyde of the formula (II): R1—CH2—CHO (II) wherein R1 has the same meaning as in formula (I), with the corresponding lower aldehyde to form an unsaturated aldehyde in an inert organic solvent; (2) continuously contacting an optionally calcined copper/zinc catalyst with the unsaturated aldehyde under isothermal conditions at temperatures of from about 45 to about 60° C. and under a hydrogen pressure of from 1 to about 300 bar.
摘要:
Compounds of the formula (I): wherein the bond between the α- and β-positions to the aldehyde group represents a C—C single bond or a cis- or trans-configured C═C double bond are useful as perfumes and perfume ingredients.
摘要:
The invention relates to compounds of the general formula (1), wherein R represents a group CH═N—OH or a group CN. The inventive compounds are characterized by interesting and original odor characteristics which diffuse extremely well and are suitable for use as fragrances, for example in cosmetic preparations, technical products or in alcoholic perfumery.
摘要:
Unsaturated ketones of general formula (I) where the groups R1, R2, R3, R4 and R5 independently ═H or 1-6 C alkyl groups, which can be saturated or unsaturated, straight-chained, branched or cyclic are characerised by an interesting and original odour characteristic with good emanation and are suitable for use as perfumes, for example in cosmetic preparations, technical products or alcoholic perfumery.
摘要:
A Compound corresponding to formula (I): wherein X is a group selected from the group consisting of —CHO, —CN, —CH═NOH, and —CH2OH, and wherein the C═C double bond assumes a Z or E configuration.
摘要:
A process to obtain 2-methyl-4-(2, 2, 3-trimethyl-cyclopent-3-en-1-yl)-but-2-en-1-ol by reacting campholene aldehyde and propionaldehyde via aldol condensation and further subjecting the resulting reaction mixture to Meerwein-Ponndorf reduction with aluminum alcoholates in the presence of a basic amine compound.
摘要:
The invention relates to hexenal derivatives of general structure (I), in which one of the bonds represented by dashes is a C—C single bond and the other is a C═C double bond, with the proviso that the C═C double bond can have a Z or E configuration, provided that it is in the C¾ position. Said derivatives are characterised by an interesting and original perfume that pervades a wide area and are suitable for use as perfumes, for example in cosmetic preparations, technical products or the alcohol-based perfume industry.
摘要:
Compounds of the formula (I): wherein X is a —(C═CH2)— group or a —CH(CH3)— group, with the proviso that when X is a —(C═CH2)— group, R1 is a C1-10 alkyl group or a C2-10 alkenyl group and when X is a —CH(CH3)— group, R1 is hydrogen, a saturated or unsaturated, linear or a branched C1-10 alkyl group, a C1-10 acyl group, a C1-10 cycloalkyl group or an aryl group are useful as perfumes.
摘要:
The use of tricyclic aldehydes as odorous materials, which can be produced through partial or total hydroformylation of tricyclo[5.2.1.02,6]-dec(adi)enes, except saturated monoaldehydes, is described. The fragrance enhancing capacity of the compounds is described in methods for their use both as perfumes and perfume enhancers or boosters.