Process for the preparation of heterocyclic compounds

Details Process for the preparation of heterocyclic compounds Process for the preparation of heterocyclic compounds

1971-11-03

1977-05-17

Todd, G. Thomas

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260243C, 260557R, 260558R, 260558P, 260561R, 260562R, C07D49904, C07D50102

Patent

active

040241297

ABSTRACT:
A process for the preparation of acylamido derivatives by reaction of a compound of the formula Z - N = C = O, wherein Z is an optionally substituted alkyl-, aryl- (preferably phenyl or naphthyl) or cycloalkyl or optionally substituted heterocyclic, preferably a penicillanic acid or a cephalosporanic acid nucleus, having carboxyl groups and an optionally present hydroxy group protected, with a carboxylic acid of the formula ##STR1## wherein Z.sup.1 is an optionally substituted hydrocarbon group, in the presence of a catalyst selected from the group consisting of substituted pyridines and their N-oxides, optionally substituted imidazoles or their N-oxides, optionally substituted benzimidazoles or their N-oxides, and optionally substituted imidazo [1,2-.alpha.] pyridines or their N-oxides.

REFERENCES:
patent: 3144452 (1964-08-01), Wild et al.
Chem. Abstracts 68:68325u, (1968).
Chem. Abstracts 69:105631j, (1968).
Chem. Abstracts 74:41694a, (1971).

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