[EN] PROCESS AND INTERMEDIATES FOR THE PREPARATION OF 3-AMINO-4-CYCLOBUTYL-2-HYDROXYBUTANAMIDE AND SALTS THEREOF<br/>[FR] PROCÉDÉ ET INTERMÉDIAIRES POUR LA PRÉPARATION DE 3-AMINO-4-CYCLOBUTYL-2-HYDROXYBUTANAMIDE ET DE SELS DE CE COMPOSÉ
申请人:MERCK SHARP & DOHME
公开号:WO2013066734A1
公开(公告)日:2013-05-10
The present invention relates to synthetic processes useful in the preparation of a compound of Formula (I), and salts thereof. Compounds of Formula (I) and salts thereof have application in the preparation of inhibitors of the hepatitis C virus, such as (1R,5S)-N-[3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]-3-[2(S)-[[[(1,1-dimethylethyl)amino]carbonyl]amino]-3,3-dimethyl-1-oxobutyl]-6, 6-dimethyl-3-azabicyclo[3.1.0]hexan-2(S)-carboxamide. The present invention also encompasses intermediates useful in the disclosed synthetic processes and the methods of their preparation.
The rhodium-catalyzed N-H and O-H insertion of amides and carboxylic acids with α-diazo-β-ketoesters to give different α-amido- and α-carboxylic-β-ketoesters is presented. Investigations were carried out to establish an efficient N-H and O-H insertion reaction using a range of different amides and carboxylic acids for the synthesis of intermediates e.g. for receptor antagonists. The reactions were performed under mild conditions with 1 mol% of catalyst and the products were formed in good yields.