Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2006-03-28
2006-03-28
Shippen, Michael L. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C512S022000
Reexamination Certificate
active
07019181
ABSTRACT:
A method is described for the preparation of a trimethylcyclohexyl-alkan-3-ol containing a proportion of trans isomer of Formula DwhereR=H, Me, Et, n-propyl, iso-propyl, n-butyl, iso-butyl or tert-butyl andR1=Me, Et, n-propyl, iso-propyl, n-butyl, iso-butyl or tert-butyl,or of a mixture of several such trimethylcyclohexyl-alkan-3-ols,wherein the method comprises catalytically hydrogenating corresponding compound(s) of Formula Bin which R and R1 in each case have the indicated meanings, in the presence of a nickel catalyst, preferably of Raney nickel, and in an absence of catalytically active amounts of copper chromite.
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Panten Johannes
Pickenhagen Wilhelm
Schatkowski Dietmar
Sch{hacek over (a)}fer Klaus
Struwe Hartmut
Pendorf & Cutliff
Shippen Michael L.
Symrise GmbH & Co. KG
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