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:
Jul. 28, 1981
Filed:
Apr. 23, 1980
Ronald A LeMahieu, North Caldwell, NJ (US);
William C Nason, Mountain Lakes, NJ (US);
Hoffmann-La Roche Inc., Nutley, NJ (US);
Abstract
Trans-3-(4-oxo-4H-quinazolin-3-yl)-2-propenoic acid derivatives of the formula ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, lower cycloalkyl, lower alkoxy, hydroxy, halo, lower alkykthio, lower alkylsulfinyl, lower alkylsulfonyl, di-(C.sub.1 -C.sub.7)alkyl-N(CH.sub.2).sub.n O-- or 2-hydroxyethoxy; R.sub.2 is hydrogen, lower alkyl or lower alkoxy; R.sub.3 is hydroxy, lower alkoxy, di-(C.sub.1 -C.sub.7)alkyl-N(CH.sub.2).sub.n O-- or di-(C.sub.1 -C.sub.7)alkyl-N(CH.sub.2).sub.n NH--; and n is 2 to 7; provided that at least one of R.sub.1 and R.sub.2 is other than hydrogen, when R.sub.3 is hydroxy, a salt thereof with a pharmaceutically acceptable base, or when R.sub.3 is di-(C.sub.1 -C.sub.7)alkyl-N(CH.sub.2).sub.n O-- or di-(C.sub.1 -C.sub.7)alkyl-N(CH.sub.2).sub.n NH--, a salt thereof with a pharmaceutically acceptable acid, and a process for the preparation thereof, are described. The compounds of formula I are useful as agents in the prevention of allergic reactions.