C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 213/79 (2006.01) C07D 213/81 (2006.01)
Patent
CA 2245713
Described are preferred processes for hydrolyzing substituted and unsubstituted cyanopyridines in the presence of a base and under substantially adiabatic conditions to produce pyridine substituted amides and/or pyridine substituted carboxylic acids. Preferred processes can be conducted in a variety of continuous reactors including cascades of reaction vessels, loop reactors or flow tube reactors. More preferred are the efficient and advantageous preparations of nicotinamide and niacin, which serve as important members of the B-vitamin complex.
L'invention concerne des processus à préférer pour l'hydrolyse de cyanopyridine substituée et non substituée en présence d'une base, et sous conditions sensiblement adiabatiques, en vue de fabriquer des amides à substitution pyridine et/ou des acides carboxyliques à substitution pyridine. Il est possible de conduire les processus en question dans une variété de réacteurs continus, y compris les séries en cascades de cuves à réaction, réacteurs en boucles ou réacteurs à tube d'écoulement. On préfère en outre utiliser des préparations efficaces et avantageuses de nicotinamide et de niacine, qui représentent des constituants importants du complexe vitaminique B.
Cao Wei
Kattau Robert A.
Kreilis George
Reilly Industries Inc.
Smart & Biggar
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