3,4-Dihydrocarbostyril derivatives and process for preparing the

Details 3,4-Dihydrocarbostyril derivatives and process for preparing the 3,4-Dihydrocarbostyril derivatives and process for preparing the

1977-05-09

1979-04-03

Coughlan, Jr., Paul M.

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

424258, 544128, 546158, C07D40112, C07D31538, C07D31540

Patent

active

041478690

ABSTRACT:
3,4-Dihydrocarbostyril derivatives represented by the formula (I) ##STR1## wherein R.sub.1 represents an alkylcarbonyl group, a cycloalkylcarbonyl group, an alkylsulfonyl group, a phenylsulfonyl group, a carbamoyl group or an alkoxycarbonyl group, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, an alkyl group, a phenylalkyl group or a phenoxyalkyl group, or R.sub.2 and R.sub.3 can form, when taken together with the nitrogen atom to which they are attached, a heterocyclic group selected from the group consisting of piperidino, pyrrolidino, morpholino and 1-piperazinyl which may be substituted with a phenyl group or an alkyl group having 1 to 4 carbon atoms, with the proviso that, when the group --NHR.sub.1 is attached to the 8-position of the 3,4-dihydrocarbostyril nucleus in which R.sub.1 represents an alkylcarbonyl group and one of R.sub.2 and R.sub.3 represents a hydrogen atom, then the other group of R.sub.2 and R.sub.3 cannot be an alkyl group, pharmaceutically acceptable acid addition salts thereof, and process for preparing the same.

REFERENCES:
patent: 3910924 (1975-10-01), Tamura et al.
patent: 3953456 (1976-04-01), Nakagawa et al.
patent: 3975391 (1976-08-01), Nakagawa et al.

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