NEW METHOD FOR PREPARING FUNCTIONALISED BENZOCYCLO-BUTENES AND ITS APPLICATION TO THE SYNTHESIS OF IVABRADINE AND ITS ADDITION SALTS WITH A PHARMACEUTICALLY ACCEPTABLE ACID

摘要

A method for production of compounds of the formula (IV), wherein R1, R2, R3 and R4 have the values indicated in the description and their use in synthesis of ivabradine and its addition salts with a pharmaceutically acceptable acid.