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US 3,948,947 AGranted
Thiazanthenyl semicarbazides
AssigneeThe Boots Company PLC
InventorsStewart Sanders Adams, Bernard John Armitage, Norman William Bristow, Bernard Vincent Heathcote
Life of this patent
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Abstract
4-(9-Xanthenyl)semicarbazide and thiosemicarbazide, 4-(9-thiazanthenyl)semicarbazide and thiosemicarbazide, and derivatives of these compounds, useful as antisecretory agents.
Claims4
A compound of formula I ##EQU17## wherein Xn represents the group ##SPC3##
- in which the rings A and B may optionally contain substituents selected from halogen, lower alkyl, lower alkoxy and hydroxy;
- R.sub.1 is hydroxy, lower alkoxy, lower alkanoyloxy, hydrogen or lower alkyl;
- R.sub.2 is hydrogen or lower alkyl;
- R.sub.3 is hydrogen or lower alkyl;
- R.sub.4 is hydrogen or lower alkyl;
- together with pharmaceutically acceptable acid addition salts of compounds of formula I;
- and, when R.sub.3 and R.sub.4 are each lower alkyl, pharmaceutically acceptable quaternary salts of compounds of formula I.
4 more elements
A compound of formula IA ##SPC4##
- in which
- R.sub.1 is hydroxy, lower alkoxy, lower alkanoyloxy, hydrogen or lower alkyl;
- R.sub.2 is hydrogen or lower alkyl;
- R.sub.3 is hydrogen or lower alkyl;
- R.sub.4 is hydrogen or lower alkyl;
- together with pharmaceutically acceptable acid addition salts of compounds of formula IA.
3 more elements
Dependencies are inferred from the claim text.