New synthesis process ivabradine and its addition salts of a pharmaceutically acceptable acid

Synthesis procedure ivabradine of formula (I): ** ** Formula wherein the compound of formula (VI): ** ** Formula wherein R1 and R2, identical or different, represent alkoxy groups (C1-C6 ) linear or branched, or together with the carbon atom carrying them form a ring of 1,3-dioxane, 1,3-dioxolane or 1,3-dioxepane, is subjected to a reductive amination reaction with the compound of formula (VII): ** ** Formula