[EN] A PROCESS FOR THE PREPARATION OF A DERIVATIVE OF 2-METHYL-2'-PHENYLPROPIONIC ACID USING NEW INTERMEDIATES<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'UN DÉRIVÉ D'ACIDE 2-MÉTHYL-2'-PHÉNYLPROPIONIQUE UTILISANT DE NOUVEAUX INTERMÉDIAIRES
申请人:ZENTIVA KS
公开号:WO2014026657A2
公开(公告)日:2014-02-20
The present invention deals with a preparation method of derivatives of methyl-2 '- phenylpropionic acid, e.g. the antihistamine bilastine of formula 9 that uses a new intermediate of formula 27 in the form of a base or salt. The intermediate reacts with a suitable alkylation reagent and with the use of auxiliary reagents, producing the ester of formula 16, wherein R stands for a C 1-C4 alkyl, which is subsequently alkali or acid hydrolyzed to bilastine. Formula 9, 27, 16
作者:Mark W. Campbell、Mingbin Yuan、Viktor C. Polites、Osvaldo Gutierrez、Gary A. Molander
DOI:10.1021/jacs.0c13077
日期:2021.3.17
small molecules is limited by the necessity of prefunctionalization to achieve chemoselective reactivity. Herein, we report the implementation of efficient, sustainable, diaryl ketone hydrogen-atomtransfer (HAT) catalysis to activate native C–H bonds for multicomponent dicarbofunctionalization of alkenes. The ability to forge new carbon–carbon bonds between reagents typically viewed as commodity solvents