[EN] PREPARATION OF BENZOFURANS AND USE THEREOF AS SYNTHETIC INTERMEDIATES [FR] PRÉPARATION DE BENZOFURANES ET LEUR UTILISATION EN TANT QU'INTERMÉDIAIRES DE SYNTHÈSE
A Photochemical Route to 2-Substituted Benzo[b]furans
摘要:
2-Substituted benzo[b]furans were synthesized by a one-step metal-free photochemical reaction between 2-chlorophenol derivatives and terminal alkynes by tandem formation of an aryl-C and a C-O bond via an aryl cation intermediate. The mild conditions and the application to chlorophenols rather of the more expensive bromo or iodo analogues makes this procedure environmentally convenient.
PREPARATION OF BENZOFURANS AND USE THEREOF AS SYNTHETIC INTERMEDIATES
申请人:Marom Ehud
公开号:US20130046103A1
公开(公告)日:2013-02-21
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.
[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.
A Photochemical Route to 2-Substituted Benzo[<i>b</i>]furans
作者:Stefano Protti、Maurizio Fagnoni、Angelo Albini
DOI:10.1021/jo3010183
日期:2012.8.3
2-Substituted benzo[b]furans were synthesized by a one-step metal-free photochemical reaction between 2-chlorophenol derivatives and terminal alkynes by tandem formation of an aryl-C and a C-O bond via an aryl cation intermediate. The mild conditions and the application to chlorophenols rather of the more expensive bromo or iodo analogues makes this procedure environmentally convenient.