| abstract |
The present invention provides, according to an aspect thereof, a novel process for the preparation of dronedarone [1] and pharmaceutically acceptable salts thereof. According to a preferred embodiment, the process comprises N-acetylating of p-anisidine or p-phenetidine with acetic anhydride, reacting of the obtained N-(4-alkoxyphenyl)acetamide with 2-bromohexanoyl chloride or bromide in the presence of aluminum chloride or bromide to obtain N-[3-(2-bromohexanoyl)-4-hydroxyphenyl]acetamide [6 a ], converting the compound [6 a ] into 2-butyl-5-benzofuranamine hydrochloride [12 a ] and subsequently converting [12 a ] into [1] or pharmaceutically acceptable salts thereof. In accordance with another aspect of this invention, there are provided novel intermediates, inter alia the novel compounds [6 a ] and [12 a ]. The novel intermediates of the present invention are stable, solid compounds, obtainable in high yields, which can be easily purified by crystallization and stored for long periods of time. |