Cycloaliphatic aldehydes and process for the preparation thereof

Details Cycloaliphatic aldehydes and process for the preparation thereof Cycloaliphatic aldehydes and process for the preparation thereof

1988-10-30

1990-03-20

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568356, 568420, C07C 4742

Patent

active

049103474

ABSTRACT:
Racemic and optically active cycloaliphatic 2,2,6-trimethylcyclohexanecarboxyaldehyde, also known as dihydrocyclocitral, are prepared by a novel process consisting in the cyclization of enol esters of formula ##STR1## wherein the wavy line defines a C--O bond of cis or trans configuration, X represents an acyl group or P(O)(OR).sub.2, wherein R stands for a lower alkyl monovalent radical or an aryl, and Z represents a monovalent radical of formula ##STR2## by means of an acid cyclization agent.

REFERENCES:
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de Botton, "Recherches sur les methylcyclohexylaldehydes", 33, Bull. Soc. Chim. Fr., p. 2466, (1966).
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Bachli et al., "Reduktion von Dihydro-cyclogeraniumsaure zu Dihydro-cyclogeraniol bwz. Dihydro-cyclocitral und Darstellung von cis-Dihydro-jon on", 34, Helv. Chim. Acta, p. 1160, (1951).

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