Process For the Production of Intermediates For the Preparation of Tricyclic Benzimidazoles
申请人:Chiesa Maria Vittoria
公开号:US20080280855A1
公开(公告)日:2008-11-13
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.