1-Acyl-2,6,6-trimethylcyclohexene derivatives, processes for producing same, intermediates therefor and organoleptic uses thereof

US-96541878-A
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(en)Described is a process for preparing several 1-acyl-2,6,6-trimethylcyclohexene derivatives defined by the generic structure: ##STR1## wherein R 1 is hydrogen or ethylidene having the structure:

[H.sub.3 C--C═ ;

R 2 is hydrogen or no group; one of the wavy lines is a carbon-carbon double bond and the other of the wavy lines is a carbon-carbon single bond; with the proviso that when the Δ 2 ,3 bond (as shown by the wavy line between the "2" and the "3" position of the ring) is a carbon-carbon double bond, then R 2 is hydrogen and R 2 and the moiety: ##STR2## are so juxtaposed that the molecule having the structure: ##STR3## exists in two different isomeric forms, a "+" form and a "-" form, using as a precursor, 2,6,6-trimethyl-1-acetyl-1,3-cyclohexadiene having the structure: ##STR4##

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