Preparation of heterocyclic aromatic aldehydes and ketones

Details Preparation of heterocyclic aromatic aldehydes and ketones Preparation of heterocyclic aromatic aldehydes and ketones

C - Chemistry, Metallurgy

07

D

260/251, 260/295

C07D 213/46 (2006.01) C07D 213/48 (2006.01) C07D 213/50 (2006.01) C07D 233/64 (2006.01) C07D 239/26 (2006.01) C07D 261/08 (2006.01)

Patent

CA 1331383

?9 Abstract of the Disclosure A process for the preparation of heterocyclic aromatic (heteroaromatic) aldehydes and ketones of the general formula (I), Image (I) where Arhet is a five-membered or six-membered heteroaro- matic radical having at least one nitrogen atom and R' is hydrogen or an alkyl radical of from 1 to 20 carbon atoms, by oxidation of the corresponding 1-hydroxyalkyl compounds (II) Image (II) wherein the oxidant is an inorganic or organic hypochlorite or hypobromite (III) in conjunction with an alpha,alpha,omega,omega-tetraalkylcycloalkane of the general formula (IV), Image (IV) where the radicals Alk are identical or different alkyls of from 1 to 4 carbon atoms, Q is one of the groups >N+=O X- ; >N-OH or >N-O (X- is an anion), n is either 0 or 1, and Y is oxygen, carbonyl, or >CR2R3; R2 and R3 are hydrogen, hydroxyl, or organic radicals in which the free valency is attached to carbon or oxygen and that may be linked to form a five- membered or six-membered ring.

583240

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