Process For the Production of Intermediates For the Preparation of Tricyclic Benzimidazoles
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United States of America Patent
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Issued Date -
Nov 13, 2008
app pub date -
Jun 20, 2006
filing date -
Jun 22, 2005
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Abandoned
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Abstract
The invention relates to a process for the synthesis of compounds of the formula 1-a and compounds of the formula 1-b. The compounds of the formula 1-a and the compounds of the formula 1-b, in which the substituents R1, R2, R3, and Ar have the meanings indicated in the description, are valuable intermediates for the preparation of pharmaceutically active compounds.
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