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:
Mar. 29, 1994
Filed:
May. 28, 1992
William W Wood, Sittingbourne, GB;
Shell Research Limited, , GB;
Abstract
A process for the preparation of a compound of general formula ##STR1## wherein X represents a cyano group, a group --COOH or a salt, ester or amido derivative thereof, R.sup.1 represents a hydrogen atom or an optionally substituted alkyl group, R.sup.2 represents an optionally substituted alkyl or phenyl group, Z represents an alkyl group or a halogen atom and n represents 0, 1, 2, 3 or 4, the process comprising reacting a compound of general formula ##STR2## with a first reactant capable of both dehydrating the amide group of said compound of general formula IV, to form a group X wherein X represents a cyano group, and reacting with the carboxy group of said compound of general formula IV to form a group with which a compound of general formula R.sup.1 R.sup.2 NH may react; subsequently reacting the resulting compound with a compound of general formula R.sup.1 R.sup.2 NH to form a compound of general formula III wherein X represents a cyano group; and optionally derivatizing that compound to form other compounds of general formula III, is disclosed.