Fremgangsmåde til fremstilling af formylimidazoler

Preparation of 4-halo-5-formyl (or 4-formyl-5-halo) - imidazole derivatives (I) comprises catalytically oxidizing the corresponding hydroxymethyl-imidazole compounds (where the formyl is replaced by CH2OH) in the presence of a noble metal catalyst and a peroxide. Preparation of 4-halo-5-formyl (or 4...

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Hauptverfasser:	WELLIG, ALAIN, HEVELING, JOSEF DR
Format:	Patent
Sprache:	dan
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Preparation of 4-halo-5-formyl (or 4-formyl-5-halo) - imidazole derivatives (I) comprises catalytically oxidizing the corresponding hydroxymethyl-imidazole compounds (where the formyl is replaced by CH2OH) in the presence of a noble metal catalyst and a peroxide. Preparation of 4-halo-5-formyl (or 4-formyl-5-halo) - imidazole derivatives of formula (I) comprises catalytically oxidizing the corresponding hydroxymethyl-imidazole compounds of formula (III) in the presence of a noble metal catalyst and a peroxide. R1 = H or optionally substituted alkyl; R2 = H or an optionally substituted alkyl, aryl or arylalkyl group; one of R3, R4 = CHO and the other is halo; one of R3, R5 = CH2OH and the other is halo.