The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 1979
Filed:
Oct. 20, 1977
Philip Knowles, Rayleigh, GB;
Edward Lunt, Westcliff-on-Sea, GB;
Stuart M Marshall, Stanford-le-Hope, GB;
Roger E Ford, Gidea Park, GB;
May & Baker Limited, Essex, GB;
Abstract
8-Azapurin-6-one derivatives of the formula: ##STR1## wherein R.sup.8 represents alkoxy of from 1 to 6 carbon atoms, and R.sup.9 represents cyano, or a group of the formula V, VI, VII, VIII or IX indicated below: ##STR2## wherein R.sup.10, R.sub.13 and R.sup.14 each represents cyano, or alkanoyl or alkoxycarbonyl of from 2 to 6 carbon atoms, R.sup.11 represents hydrogen, cyano, or alkanoyl or alkoxycarbonyl of from 2 to 6 carbon atoms, R.sup.12 represents hydrogen or, when R.sup.11 represents hydrogen, R.sup.12 represents alkyl of from 1 to 6 carbon atoms or alkoxycarbonyl of from 2 to 6 carbon atoms, or the pair of symbols R.sup.11 and R.sup.12 form together an alkylene chain of the formula --(C.sub.q H.sub.2q)-- wherein q is an integer from 3 to 6, R.sup.15 and R.sup.16 each represents hydrogen or alkyl of from 1 to 6 carbon atoms, and Y.sup.1 represents oxygen or sulphur, are new compounds possessing pharmacological properties, in particular properties of value in the treatment of respiratory disorders such as allergic bronchial asthma.