PRODUCTION OF 3-(3, 4, 5, 6- TETRAHYDROPHTHALIMIDE)-BENZALDEHYDE

3-(3,4,5,6-Tetrahydrophthalimido)-benzaldehydes of the type I I or corresponding derivatives substituted in the phenyl ring are prepared by (a) acetalization of a 3-nitrobenzaldehyde III or of a corresponding derivative with an alcohol IV in the presence of an acidic catalyst to give the correspondi...

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Bibliographische Detailangaben
Hauptverfasser:	ROOTARU RIYUUPU, KURAUSU FUITSUSHIYAA, PEETAA PURATO
Format:	Patent
Sprache:	eng
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:	3-(3,4,5,6-Tetrahydrophthalimido)-benzaldehydes of the type I I or corresponding derivatives substituted in the phenyl ring are prepared by (a) acetalization of a 3-nitrobenzaldehyde III or of a corresponding derivative with an alcohol IV in the presence of an acidic catalyst to give the corresponding cyclic acetal V V (b) reduction of the cyclic acetal V with hydrogen to give the corresponding amino compound II and (c) subsequent condensation of this aminophenyl acetal II with 3,4,5,6-tetrahydrophthalic anhydride in an acidic reaction medium.