Process for the preparation of N-carboxymethyleneanthranilic aci

Details Process for the preparation of N-carboxymethyleneanthranilic aci Process for the preparation of N-carboxymethyleneanthranilic aci

1997-02-07

1998-09-22

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 43, C07C22900

Patent

active

058115722

ABSTRACT:
Process for the preparation of N-carboxymethyleneanthranilic acid esters of the formula (3) ##STR1## by reacting a compound of the formula (1) ##STR2## in which R' is hydrogen or a straight-chain or branched alkyl radical having 1 to 4 carbon atoms and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and independently of one another are hydrogen, halogen, NO.sub.2, a straight-chain or branched alkyl, alkoxy or halogenated alkyl radical having in each case 1 to 6 carbon atoms, with a glyoxylic acid ester of the formula (2)

REFERENCES:
patent: 4824995 (1989-04-01), Drysdale
patent: 5686625 (1997-11-01), Kos
Ullman's Encyclopedia of Industrial Chemistry, 5th Ed., vol. A14, Editor: Elvers, et al, 1988, pp. 150-151.
Borrione, E., et al, (1988) Synthesis and Cycloaddition Reactions of Ethyl (1988).
German Official Action.
Derwent Patent Family & Abstract.
Z. Naturforsch, 37b, pp. 1352-1354, Mulbacher, `Effiziente Synthese von 1-Aryl-4-oxo-azetidin-2-carbonsaureethylester.`, 1982.

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