Process for preparing pharmaceutical intermediates

The invention relates to a new process for the preparation of 1-(3,4-dimethoxy-phenyl)-4-methyl-5-ethyl-7,8-dimethoxy-5H-2,3-benzodizepine of Formula (I) which comprises reacting a compound of general Formula (II) (wherein R and R independently each stands for C1-4-alkyl or together form C2-6-alkyle...

Full description

Saved in:
Bibliographic Details
Main Authors GREFF ZOLTAN, VAGO PAL, MOLNARNE SAMU ERIKA, SIMIG GYULA
Format Patent
LanguageCzech
English
Published 15.12.2004
Edition7
Online AccessGet full text

Cover

More Information
Summary:The invention relates to a new process for the preparation of 1-(3,4-dimethoxy-phenyl)-4-methyl-5-ethyl-7,8-dimethoxy-5H-2,3-benzodizepine of Formula (I) which comprises reacting a compound of general Formula (II) (wherein R and R independently each stands for C1-4-alkyl or together form C2-6-alkylene) with hydrazine or a hydrate or salt thereof formed with an inorganic or organic acid. 1-(3,4-dimethoxy-phenyl)-4-methyl-5-ethyl-7,8-dimethoxy-5H-2,3-benzodiazepine of the Formula I is a known anxiolytic agent. The invention also relates to new intermediates and a process for the preparation thereof.
Bibliography:Application Number: CZ20040000792