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US 4,039,544 AGranted
Azapurinones
AssigneeMay & Baker Limited
InventorsBarbara Joyce Broughton, Bryan John Large, Stuart Malcolm Marshall, David Lord Pain, Kenneth Robert Harry Wooldridge
Life of this patent
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Abstract
The invention provides certain novel 8-azapurin-6-one derivatives substituted in the 2-position by a substituted phenyl group, preferably carrying an alkoxy in the 2-position, which possess valuable pharmacological properties especially in the treatment of respiratory disorders manifested by the interaction of tissue-fixed antibodies with specific antigens.
Claims13
An 8-azapurin-6-one of the formula:
- ##STR17## wherein R.sup.3 is straight- or branched-chain alkoxy of from 1 to 4 carbon atoms and R.sup.1 is alkylthio of 1 to 6 carbon atoms, alkylsulphinyl of 1 to 6 carbon atoms, alkylsulphonyl of 1 to 6 carbon atoms, or alkoxycarbonyl of 2 to 7 carbon atoms, and pharmaceutically acceptable salts thereof.
Dependencies are inferred from the claim text.