摘要:
The present invention concerns the novel odorant 1,1,2,3,3,6-hexamethyl-4,5,6,7-tetrahydro-5-indanone, I, a process for the manufacture of I, novel intermediates used in the process and fragrance compositions containing I. ##STR1## The process for the manufacture of 1,1,2,3,3,6-hexamethyl-4,5,6,7-tetrahydro-5-indanone comprises hydroborating 1,1,2,3,3,6-hexamethyl-4,7-dihydroindane and oxidizing the hydroboration product to 1,1,2,3,3,6-hexamethyl-4,5,6,7-tetrahydro-5-indanone, or reductively alkylating, especially methylating, 5-nitro-1,1,2,3,3,6-hexamethylindane and converting the resulting 5-dialkyl-amino-1,1,2,3,3,6-hexamethylindane into 1,1,2,3,3,6-hexamethyl-4,5,6,7-tetrahydro-5-indanone by reduction of the benzene ring and hydrolysis of the resulting enamine.
摘要:
The invention concerns novel odorants of formula I wherein R is hydrogen or methyl. ##STR1## The invention also concerns fragrance compositions containing I. Formula I is intended to particularly embrace as the racemates, (.+-.)-3.alpha.-acetyl-3.beta.,4.beta.,5,5-tetramethyl-2,3,4,4a.beta.,5,6,7,8-octahydronapthalene and (.+-.)-3.alpha.-acetyl-4.beta.,5,5-trimethyl-2,3.beta.,4,4a.beta.,5,6,7,8-octahydronapthalene.
摘要:
The invention is concerned with novel bicyclic epoxides, a process for their manufacture and novel fragrance and flavor compositions containing the same.
摘要:
This invention is concerned with novel substituted bicyclo[4.3.0]non-1(6)-en-8-yl methyl ketones, a process for their manufacture and novel fragrance and flavor compositions containing same.
摘要:
The invention concerns novel odorants of formula I wherein R is hydrogen or methyl. ##STR1## The invention also concerns fragrance compositions containing I. Formula I is intended to particularly embrace as the racemates, (.+-.)-3.alpha.-acetyl-3.beta.,4.beta.,5,5-tetramethyl-2,3,4,4a.beta.,5,6,7,8-octahydronapthalene and (.+-.)-3.alpha.-acetyl-4.beta.,5,5,-trimethyl-2,3.beta.,4,4a.beta.,5,6,7,8-octahydronapthalene.
摘要:
A process for the manufacture of .alpha.- and .beta.-irone, namely the compounds of formula I, as well as novel intermediates in the process is provided. ##STR1##
摘要:
A method for the manufacture of the four geometric isomers of 4(2-butenylidene)-3,5,5-trimethyl-2-cyclohexen-1-one is provided. The process comprises pyrolyzing a compound of the formula ##STR1## wherein R represents lower-alkyl-oxycarbonyl, aryl-oxycarbonyl, or, preferably, lower-alkanoyl, benzoyl or substituted benzoyl.
摘要:
Novel odorants, having the formula ##STR1## wherein R represents sec. butyl, tert. butyl or cyclohexyl. A process for preparing the novel odorants from novel intermediates and fragrance compositions containing the odorants are also taught.
摘要:
Novel trimethyl-acetyl-octalins mixtures are prepared by a Diels-Alder-type reaction involving methyl vinyl ketone and compounds having the structure ##STR1## wherein one of the two lines denoted by dots represents an additional bond.The novel compounds possess unique and unexpected desirable olfactory properties.