Method for the preparation of (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-l,4-dihydro-1-6-naphthyridine-3-carbox-amide and the purification thereof for use as an active pharmaceutical ingredient

Method for the preparation of (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-l,4-dihydro-1-6-naphthyridine-3-carbox-amide and the purification thereof for use as an active pharmaceutical ingredient

The present invention relates to a novel and improved process for preparing (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide of the formula (I)and also the preparation and use of the crystalline polymorph I of (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethox...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Garke, Gunnar, Grunenberg, Alfons, Platzek, Johannes
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:The present invention relates to a novel and improved process for preparing (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide of the formula (I)and also the preparation and use of the crystalline polymorph I of (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide of the formula (I).