Preparation of vinpocetin used as vasodilator and nootropic agent, comprises dehydrating vincamine ester to apovincamine derivative and transesterifying

Preparation of vinpocetin (I) comprises dehydrating a vincamine ester (II) to form an apovincamine derivative (III) which is then transesterified to (I). Dehydration is with thionyl chloride, phosphoroxy chloride, phosphorus pentoxide, acetic anhydride or hydrochloric acid. Preparation of vinpocetin...

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Hauptverfasser:	BENDER, CARSTEN, SAUTER, MARKUS
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY
Online-Zugang:	Volltext bestellen
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