Benzopyrano and benzothiopyrano [2,3-6] pyridines

Details Benzopyrano and benzothiopyrano [2,3-6] pyridines Benzopyrano and benzothiopyrano [2,3-6] pyridines

1974-03-19

1976-01-06

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260287CF, 2602949, 260295T, 2602955R, 260296T, 260297T, 424258, 424263, C07D49108, C07D51308

Patent

active

039311996

ABSTRACT:
Heterocyclic compounds of the formula: ##SPC1##
Wherein A is a carbonyl group, a methylene group or an alkylidene group having 2 to 4 carbon atoms; B is an oxygen atom, a sulfur atom or --N(R')-- (wherein R' is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms); each of R.sup.1 and R.sup.2 is a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a phenyl group which may be substituted by a halogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; X is an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or OM (wherein M is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a metal atom or NH.sub.4); and ring P represents a pyridine ring, are useful as anti-allergic agents.

REFERENCES:
patent: 3803153 (1974-04-01), Villani
Dean et al., "Chem. Abstracts" Vol. 52, (1958), pp. 4622-4623.

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