Process for production of alkenyl substituted aromatic compound

Details Process for production of alkenyl substituted aromatic compound Process for production of alkenyl substituted aromatic compound

C - Chemistry, Metallurgy

07

C

260/621.1, 260/6

C07C 39/19 (2006.01) C07C 37/00 (2006.01) C07C 209/68 (2006.01)

Patent

CA 1260015

- 35 - PROCESS FOR PRODUCTION OF ALKENYL SUBSTITUTED AROMATIC COMPOUND ABSTRACT OF THE DISCLOSURE A process for producing an alkenyl substituted aromatic compound having the general formula (I): Image (I) wherein Ar represents an aromatic ring, R1 represents an alkenyl group having 2 to 8 carbon atoms, p is 1, 2, or 3 provided that R1 may be the same or different when p is 2 or 3, R2 represents an alkyl group having 1 to 8 carbon atoms, q is 0, 1, or 2 provided that R2 may be the same or different when q is 2, X represents -OH or -NR3R4 wherein R3 and R4 independently represent hydrogen or an alkyl group having 1 to 2 carbon atoms, n is 1 or 2, provided that the sum of p and q is 1, 2, or 3 comprising the step of catalytically dehydrogenating an alkyl substituted aromatic compound having the general formula (II): Image (II) wherein R represents an alkyl group having 2 to 8 carbon atoms and Ar, R2, X, p, q, and n are the same as defined above, n is 1 or 2, provided that R5 may be the same or different when p is 2 or 3 in the presence of a catalyst comprising (a) at least one iron oxide as a main component and (b) at least one oxide of metals belonging to the group III, IV or V of the periodic table of atoms. This catalyst can produce an alkenyl substituted - 36 - aromatic compound having a hydroxyl or amino group in the aromatic ring thereof from the dehydrogenation of the corresponding alkyl substituted aromatic compound at a high yield and high selectivity and has a prolonged catalyst life.

510915

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