Patent ID: 6492524
Filing Date: 2002-12-10
Classification: C07D

Abstract:
A process for the synthesis of an aryl pyridine base said process comprising reacting an aromatic aldehyde or ketone of the formula R1COR2 wherein R1 is phenyl or alkyl phenyl, R2 is alkyl with 1 to 2 carbon atoms with an acrolein or crotonaldehyde or an allylic alcohol of the formula R3CH=CHCH2OH wherein R3 is selected from the group consisting of hydrogen, methyl, ethyl and aryl, with ammonia in a gaseous phase, the mole ratio of the aromatic aldehyde or ketone to allylic alcohol being in the range of 1:1 to 1:5, the mole ratio of ammonia to aromatic aldehyde and/or ketone being in the range of 0.5 to 5.0, at a reaction temperature in the range of 350Â° C. to 500Â° C., in the presence of a catalyst consisting of modified or unmodified zeolite having an atomic ratio of Si to Al in the range of 2.5 to 12.5 with at least one ion of and/or at least one compound of a metal selected from lead and lanthanum, to obtain said aryl pyridine base.