C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/277, 260/295
C07D 401/04 (2006.01) C07D 213/60 (2006.01) C07D 213/74 (2006.01) C07D 213/85 (2006.01)
Patent
CA 1138449
Abstract of the disclosure: 4-Aminopyridines of the formula Image in which R1 is hydrogen or alkyl of up to 6 carbon atoms and R2 represents a) alkyl up to 6 carbon atoms, which may be substituted up to three times with at least one radical from the group of halogen and hydroxyl, with formyl acetalized with an alcohol of up to 3 carbon atoms, alkylthio of up to 3 carbon atoms, phenylthio or the corresponding alkyl- and phenyl-sulfoxy and sulfone groups, the phenyl ring optionally carrying in each case up to three substituents from the group of alkyl, alkyl halide, alkoxy, mono- or dialkylamino hav- ing each up to 4 carbon atoms in each alkyl radical, halogen, nitro, amino and hydroxy, or b) phenylalkyl or diphenyl- kyl of up to 6 carbon atoms in the linear or branched alkyl moiety, the phenyl rings optionally being substituted up to three times with at least one radical from the group of alkyl, alkoxy, alkyl halide with up to 4 carbon atoms each, halogen, amino, hydroxy, nitro, the sulfamoyl group and the methylene dioxy radical, or - 1a - HOE 79/A 001 R1 and R2, together with the nitrogen atom present in the 4-position, form a five- to seven-membered heterocyclic ring optionally substituted with alkyl of up to 2 car- bon atoms and including up to two hetero-atoms, the second hetero-atom being oxygen, sulfur optionally carrying up to two oxygen atoms, or nitrogen, and R3 and R4 which may be identical or different, each repre- sent alkyl of up to 9 carbon atoms, one of the two radicals optionally also being hydrogen, Y is a nitro or a cyano group, and Z stands for hydrogen or halogen, and the physiologically acceptable salts of these compounds, processes for their preparation and medicaments made there- of. One use for the comounds of the invention is as broncho- spasmolytic agents. They may also be used as intermediates in the preparation of other drugs.
343136
Anagnostopulos Hiristo
Greve Wilfried
von Schuh Heinzgeorg
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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