Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1982-10-29
1984-11-27
Fan, Jane T.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549325, 549311, 549307, 560 1, 560122, 560106, 560265, C07D30720, C07D30783
Patent
active
044852452
ABSTRACT:
Process for selective homogeneous catalytic hydrogenation of carboxylic acid anhydrides to ester or lactones at an improved rate and to obtain improved yields wherein the catalyst is a ruthenium trichlorostannate complex of the formula: ##STR1## wherein X is hydrogen, chlorine, bromine, iodine or lower alkyl; m is the integer 1 or 2; n is an integer of from 0 to 3 but when n is 2 or 3, X may be the same or different; M is P, As or Sb; R.sup.6, R.sup.7 and R.sup.8 independently are lower alkyl, cycloalkyl, aryl, benzyl or a bidentate legand; x is an integer of from 1 to 4 but when x is 2 or more, M may be the same or different; L is a neutral ligand, olefin, CO or (R.sup.9).sub.2 CO wherein R.sup.9 is lower alkyl; y is an integer of from 0 to 3 but when y is 2 or 3, L may be the same or different; and the sum of x and y is at least 2.
REFERENCES:
patent: 3957827 (1976-05-01), Lyons
patent: 3968133 (1976-07-01), Knifton
Hsu Chao-Yang
Lyons James E.
Back Standford M.
Fan Jane T.
Hess J. Edward
Johnson Donald R.
Sun Tech, Inc.
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