Process for the preparation of 1-(2,2,6-trimethylcyclohexyl)-3-alkanols
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United States of America Patent
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Issued Date -
Jun 27, 2002
app pub date -
Dec 12, 2001
filing date -
Dec 15, 2000
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a process for the preparation of 1-(2,2,6-trimethylcyclohexyl)-3-alkanols with a content of at least 15% of trans isomers, based on the total amount of the 1-(2,2,6-trimethylcyclohexyl)-3-alkanol, by catalytic hydrogenation, where a) 1-(2,6,6-trimethyl-1 or 2-cyclohexen-1-yl)-1-alken-3-ones are reacted in the presence of ruthenium-containing catalysts or catalyst mixtures, or b) 1 -(2,6,6-trimethyl-1 or 2-cyclohexen-1-yl)-1-alken-3-ols are reacted in the presence of catalysts which contain 1 or more elements of groups Ib, VIb and VIII of the Periodic Table of the Elements.
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