03957827 is referenced by 28 patents and cites 6 patents.

.gamma.-Lactones may be selectively prepared by the hydrogenation of cyclic carboxylic acid anhydrides under mild conditions in a homogeneous solution in the presence of a ruthenium catalyst of the formula ##EQU1## WHEREIN X is hydrogen, chlorine, bromine, iodine, or lower alkyl; n is an integer of from 0-2, but when n is 2, X may be the same or different; L is a neutral ligand, olefin, or CO; y is an integer of from 0-3, but when y is 2 or 3, L may be the same or different; R.sub.6, R.sub.7 and R.sub.8 are lower alkyl, cycloalkyl of from 5 to 15 carbon atoms, aryl, benzyl, or a bidentate ligand, and each of the R groups may be the same or different; and x is an integer of from 1-3.

In a like manner, esters may be prepared in high yields by the selective hydrogenation of acyclic carboxylic acid anhydrides.

Title
Hydrogenation of carboxylic acid anhydrides to lactones or esters by homogeneous catalysis
Application Number
5/515771
Publication Number
3957827
Application Date
October 17, 1974
Publication Date
May 18, 1976
Inventor
James E Lyons
Wallingford
PA, US
Agent
Stanford M Back
Donald R Johnson
J Edward Hess
Assignee
Sun Ventures
PA, US
IPC
C07D 307/88
C07D 307/20
C07C 68/00
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