Pyridyl oxamic acid derivatives and use in the prevention of allergic reactions

Abstract

Anti-allergic agents of aromatic and heterocyclic oxamic acid derivation present the following formula: ##STR1## in which A is a member selected from the group consisting of 2-thiazolyl, 2-pyridyl, 2-pyridyl-N-oxide, 6-(lower)alkyl-2-pyridyl, 3-cyano-2-pyridyl, 3-pyridyl, 4-pyridyl, 2-pyrimidinyl, 2-pyrazinyl, .alpha.-naphthyl, .beta.naphthyl, phenyl, 2,6-dichlorophenyl, and substituted phenyl moieties containing from one to three substituents in any of the 2,3,4 and 5 positions of the phenyl ring, independently selected from the group consisting of lower alkyl, lower alkylthio, lower alkylsulfinyl, lower alkoxy, hydroxy(lower)-alkoxy, 2-(lower alkoxy oxalyloxy) ethoxy, benzyloxy, N-mono-and di-lower alkylamino(lower)-alkoxy, halo, sulfamyl, polyhalo(lower)alkyl, carbamyl, N-lower alkylcarbamyl, nitro, mono-and di-lower alkylamino, phenylazo, carboxy, lower alkylcarbonyl, cyano, carb(lower)alkoxy, phenoxy(lower)alkoxy, lower alkoxyoxalamido and lower alkoxyoxalamidophenoxy radicals; B, when taken alone, is a member selected from the group consisting of --OH, lower alkoxy, --NH.sub.2, --NHOH, cyclohexyloxy and phenoxy; and Y is a member selected from the group consisting of oxygen and when taken with B and the carbon atom to which they are attached, forms the moiety ##STR2##

Dependencies are inferred from the claim text.