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US 4,359,468 AGranted
Antiallergic N-[4-(indolyl)-piperidino-alkyl]-benzimidazolones
AssigneeBoehringer Ingelheim GmbH
InventorsKurt Freter, Victor Fuchs, James T. Oliver
Life of this patent
Estimating the term…
Abstract
Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, halogen or methoxy; R.sub.2 is hydrogen or lower alkyl; R.sub.3 is hydrogen or lower alkyl; R.sub.4 is hydrogen, lower alkyl or alkenyl of 3 carbon atoms; and n is 2 to 6; and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds as well as their salts are useful as antiallergics and hypotensives.
Claims5
A compound of the formula ##STR15## wherein R.sub.1 is hydrogen, halogen or methoxy;
- R.sub.2 is hydrogen or lower alkyl;
- R.sub.3 is hydrogen or lower alkyl;
- R.sub.4 is hydrogen, lower alkyl or lower alkenyl;
- n is 2 to 6;
- or a non-toxic, pharmacologically acceptable acid addition salt thereof.
2 more elements
Dependencies are inferred from the claim text.