PROCESS FOR PREPARATION OF DRONEDARONE BY N-BUTYLATION
申请人:Friesz Antal
公开号:US20140114081A1
公开(公告)日:2014-04-24
The invention relates to a novel process for preparation of dronedarone (I) and pharmaceutically acceptable salts thereof where the compound of formula (II) or salt thereof is reacted with a compound of formula L-(CH
2
)
3
—CH
3
(III), where L is a leaving group, and isolating the obtained product and, if desired, converting it into a pharmaceutically acceptable salt thereof. The invention also relates to some novel intermediary compounds and the preparation thereof.
REDUCTIVE AMINATION PROCESS FOR PREPARATION OF DRONEDARONE USING AMINE INTERMEDIARY COMPOUND
申请人:Friesz Antal
公开号:US20140018554A1
公开(公告)日:2014-01-16
The invention relates to a novel process for preparation of drohedarone of formula (I) and pharmaceutically acceptable salts thereof characterized in that a compound of formula (II) is reacted in the presence of a reductive agent with butyraldehyde and/or butanoic acid, and isolating the obtained product and, if desired, converting it into a pharmaceutically acceptable salt thereof. The invention also relates to some hovel intermediary compounds and the preparation thereof.
[EN] PREPARATION OF BENZOFURANS AND USE THEREOF AS SYNTHETIC INTERMEDIATES<br/>[FR] PRÉPARATION DE BENZOFURANES ET LEUR UTILISATION EN TANT QU'INTERMÉDIAIRES DE SYNTHÈSE
申请人:MAPI PHARMA HOLDINGS CYPRUS LTD
公开号:WO2011099010A1
公开(公告)日:2011-08-18
The present invention provides several synthetic methods for preparing N-(2-butylbenzofuran-5-yl)-N-(methylsulfonyl)methanesulfonamide, a compound of formula (3), an intermediate in the preparation of Dronedarone. The present invention further provides a process for preparing Dronedarone, comprising the steps of converting 2-butyl-5-bis(methanesulfon)-amidobenzofuran of formula (3) to Dronedarone, wherein the 2-butyl-5-bis(methanesulfon)-amidobenzofuran of formula (3) is prepared by the processes of the present invention.
PROCESS FOR PREPARATION OF DRONEDARONE BY REMOVAL OF HYDROXYL GROUP
申请人:SANOFI
公开号:US20150005515A1
公开(公告)日:2015-01-01
The invention relates to a process for preparation of dronedarone of formula (I) and pharmaceutically acceptable salts thereof characterized in that from the compound of formula (II). the hydroxyl group is removed, and the obtained product is isolated and, if desired, converted into a pharmaceutically acceptable salt thereof.
A process is provided for preparing dronedarone or pharmaceutically acceptable salts thereof. The process comprises reacting 5-amino-2-butyl-3-(4-[3-(dibutylamino)propoxy]benzoyl)benzofuran (compound A) with methanesulfonyl chloride without any catalyst to provide crude dronedarone hydrochloride, which is purified to afford highly pure product. Then, the dronedarone hydrochloride can be converted to highly pure dronedarone through treatment with an alkaline solvent, the dronedarone can be further converted to other pharmaceutically acceptable salts of dronedarone. In this process, acylation between compound A and methanesulfonyl chloride is carried out successfully and the formation of the dimethylsulfonyl by-product is inhibited.