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:
Apr. 19, 1988
Filed:
Jul. 23, 1986
Alexander W Oxford, Royston, GB;
Colin D Eldred, Ware, GB;
Ian H Coates, Hertford, GB;
James A Bell, Ware, GB;
David C Humber, Ealing, GB;
George B Ewan, Chalfont St. Peter, GB;
Sanofi, , FR;
Abstract
The invention relates to a process for the preparation of a compound of general formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom or a C.sub.1-10 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl-(C.sub.1-4)alkyl, C.sub.3-6 alkenyl, C.sub.3-10 alkynyl, phenyl or phenyl-(C.sub.1-3)alkyl group, and one of the groups represented by R.sup.2, R.sup.3 and R.sup.4 is a hydrogen atom or a C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.2-6 alkenyl or phenyl-(C.sub.1-3)alkyl group and each of the other two groups, which may be the same or different, represent a hydrogen atom or a C.sub.1-6 alkyl group; or a salt or protected derivative thereof, by cyclization of a compound of general formula (II) ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined above, or a salt or a protected derivative thereof. The compounds of formula (I) are potent and selective antagonists at 'neuronal' 5-hydroxytryptamine receptors.