Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1990-05-01
1992-01-07
Hollrah, Glennon H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549266, 549272, 549273, 549326, 549328, 502213, C07D30728
Patent
active
050793721
ABSTRACT:
A method for producing a lactone by hydrogenating a dicarboxylic acid, a dicarboxylic acid anhydride and/or a dicarboxylic acid ester in the presence of a catalyst, wherein the hydrogenation reaction is conducted in the liquid phase in the presence of (1) ruthenium, (2) an organic phosphine and (3) a compound of a metal selected from the group consisting of Groups IVA, VA and IIIB in the Periodic Table.
According to the present invention, for the production of a lactone by hydrogenating a dicarboxylic acid, a dicarboxylic acid anhydride and/or a dicarboxylic ester, the reaction is conducted in a homogeneous liquid phase reaction by using the ruthenium,organic phosphine and compound of a metal selected from the group consisting of Groups IVA, VA and IIIB, of the present invention as the catalyst, whereby the desired lactone product can be obtained at high selectivity under a mild condition as compared with the conventional methods.
REFERENCES:
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patent: 3997569 (1976-12-01), Powell
patent: 4268689 (1981-05-01), Knifton
patent: 4415740 (1983-11-01), Kaufman
patent: 4620017 (1986-10-01), Drake
patent: 4931573 (1990-06-01), Wada et al.
Hara Yoshinori
Sasaki Koushi
Wada Keisuke
Hollrah Glennon H.
Mitsubishi Kasei Corporation
Russell Mark W.
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