Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1987-12-31
1989-06-06
Chan, Nicky
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549419, 549420, 549423, C07D30930
Patent
active
048373451
ABSTRACT:
A process for producing a tetrahydropyran-3-one derivative of the formula: ##STR1## wherein R is a hydrogen atom; a straight chained or branched C.sub.1 -C.sub.10 alkyl group which is unsubstituted or substituted by a halogen atom, a hydroxyl group, a C.sub.1 -C.sub.6 alkoxy group, a C.sub.1 -C.sub.6 alkylthio group, a C.sub.1 -C.sub.6 alkylcarbonyloxy group, a C.sub.1 -C.sub.6 alkoxycarbonyl group, a C.sub.1 -C.sub.6 mono- or dialkylamino group, a C.sub.3 -C.sub.6 cycloaklyl group, a C.sub.1 -C.sub.6 alkylaminocarbonyl group, a C.sub.1 -C.sub.6 alkylcarbonylamino group, a C.sub.1 -C.sub.6 alkylcarbonyl group or a phenyl or benzoyl group which is unsubstituted or substituted by a halogen atom, a C.sub.1 -C.sub.6 alkyl group, a C.sub.1 -C.sub.6 alkoxy group, a C.sub.1 -C.sub.6 alkythio group or a C.sub.1 -C.sub.6 alkoxycarbonyl group; a C.sub.3 -C.sub.6 cycloalkyl group; or a phenyl or biphenyl group which is unsubstituted or substituted by a halogen atom, a C.sub.1 -C.sub.6 alkoxy group or C.sub.1 -C.sub.6 alkylthio group, which comprises reacting a 2H-pyran-3(6H)-one derivative of the formula: ##STR2## wherein R is as defined above, and R' is a straight chained or branched C.sub.1 -C.sub.6 acyl group which is unsubstituted or substituted by a halogen atom; a benzoyl group; a C.sub.1 -C.sub.6 alkoxycarbonyl group; or a mono- or dialkylaminocarbonyl group which is unsubstituted or substituted by a C.sub.1 -C.sub.3 alkyl group or a phenyl group, with hydrogen in the presence of a catalyst selected from the group consisting of cobalt, nickel, ruthenium, rhodium, palladium, iridium, platinum and copper chromite.
Hatanaka Masataka
Numata Tatsuo
Watanabe Jun-ichi
Chan Nicky
Nissan Chemical Industries Ltd.
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