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:
Dec. 27, 1983
Filed:
Oct. 19, 1981
Saul B Kadin, New London, CT (US);
Pfizer Inc., New York, NY (US);
Abstract
Antiallergy and antiulcer agents having the formula (I), ##STR1## and their pharmaceutically acceptable salts, wherein R.sub.1 and R.sub.2 taken separately are each hydrogen or lower alkyl; and R.sub.1 and R.sub.2 taken together are alkylene of 3-9 carbon atoms or phenylalkylene of 9-11 carbon atoms, with the proviso that the ring so formed is between 5- and 8-membered; acids of the formula (II), ##STR2## wherein R.sub.1 and R.sub.2 are as defined above and R.sub.3 is hydrogen, which are useful as intermediates for compounds of the formula (I), but in many instances also possess the same useful biological activity as do formula I compounds; and intermediates of the formula II wherein R.sub.1 and R.sub.2 are defined as above, and R.sub.3 is alkyl of 1 to 4 carbon atoms, carbalkoxy of 2 to 5 carbon atoms, carbophenoxy or carbobenzoxy, are also described.