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US 4,066,644 AGranted
Pyrazolo [1,5-a]pyrido[3,2-e]pyrimidine-7-carboxylic acid heterocyclic derivatives
AssigneeE. R. Squibb & Sons, Inc.
InventorsTheodor Denzel, Hans Hoehn
Life of this patent
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Abstract
New derivatives of pyrazolo[1,5-a]pyrido[3,2-e]-pyrimidine-7-carboxylic acid have the general formula ##STR1## The new compounds are useful as central nervous system depressants and as anti-inflammatory agents.
Claims10
A compound of the formula ##STR34## wherein R, R.sup.1 and R.sup.3 each is hydrogen or lower alkyl;
- R.sup.2 is hydrogen, lower alkyl or phenyl;
- R.sup.4 is aziridinyl, pyrrolidino, piperidino, pyrazolyl or piperazinyl, said heterocyclics being unsubstituted or substituted with a hydroxy-lower alkyl group or one or two lower alkyl groups;
- and physiologically acceptable salts thereof.
Dependencies are inferred from the claim text.