[EN] AN IMPROVED PROCESS FOR THE SYNTHESIS OF (+/-) 2-AMINO-N-[2,(S,5-DIMETHOXYPHENYL)-2-HYDROXYETHYL] ACETAMIDE MONOHYDROCHLORIDE [FR] PROCESSUS DE SYNTHESE AMELIORE DE (+/-) 2-AMINO-N-[2,(S,5-DIMETHOXYPHENYL)-2-HYDROXYETHYL] ACETAMIDE MONOHYDROCHLORURE
[EN] AN IMPROVED PROCESS FOR THE SYNTHESIS OF (+/-) 2-AMINO-N-[2,(S,5-DIMETHOXYPHENYL)-2-HYDROXYETHYL] ACETAMIDE MONOHYDROCHLORIDE [FR] PROCESSUS DE SYNTHESE AMELIORE DE (+/-) 2-AMINO-N-[2,(S,5-DIMETHOXYPHENYL)-2-HYDROXYETHYL] ACETAMIDE MONOHYDROCHLORURE
Process for the synthesis of (+) 2-amino-n-{2, (2,5-dimethoxy phenyl)-2-hydroxyethyl} acetamide monohydrochloride
申请人:——
公开号:US20040198836A1
公开(公告)日:2004-10-07
This invention relates to an improved process for synthesizing (±)-2-Amino-N-[2-(2,5-dimethoxyphenyl]-2-hydroxyethyl acetamide monohydrochloride in good yield and in a cost effective manner from 1-(2,5-dimethoxyphenyl)-2-bromoethanone by reacting the same with hexamine in the presence of novel solvent system comprising Tetrahydrofuran and water. The resulting aminoethanone is acylated with haloacetylchloride and sodium acetate in acetone-water solvent system. This product is reduced selectively first with sodium borohydride and subsequently with stannous chloride. This product is converted in situ to the corresponding hydrochloride salt immediately after reduction on its own.
The invention provides a process for the preparation of 2-amino-N-[2-(2,5-dimethoxyphenyl)-2-hydroxyethyl]acetamide of the formula 1 by hydrogenolysis of substituted 2-dibenzylamino-N-[2-(2′,5′-dimethoxyphenyl)-2-hydroxy-ethyl]acetamide having the formula (5), wherein Ar and Ar′are aryl groups.
1
The invention provides a process for the preparation of 2-amino-N-[2-(2,5-dimethoxyphenyl)-2-hydroxyethyl]acetamide of the formula 1 by hydrogenolysis of substituted 2-dibenzylamino-N-[2-(2′,5′-dimethoxyphenyl)-2-hydroxy-ethyl]acetamide having the formula (5), wherein Ar and Ar′ are aryl groups.
1
The invention provides a process for the preparation of 2-amino-N-[2-(2,5-dimethoxyphenyl)-2-hydroxyethyl]acetamide of the formula 1 by hydrogenolysis of substituted 2-dibenzylamino-N-[2-(2′,5′-dimethoxyphenyl)-2-hydroxy-ethyl]acetamide having the formula (5), wherein Ar and Ar′ are aryl groups,
Process for the synthesis of (±) 2-Amino-N-[2,(2,5-dimethoxy phenyl)-2-hydroxyethyl] acetamide monohydrochloride
申请人:Sanmar Specialty Chemicals Ltd.
公开号:US07094928B2
公开(公告)日:2006-08-22
This invention relates to an improved process for synthesizing (±)-2-Amino-N-[2-(2,5-dimethoxyphenyl]-2-hydroxyethyl acetamide monohydrochloride in good yield and in a cost effective manner from 1-(2,5-dimethoxyphenyl)-2-bromoethanone by reacting the same with hexamine in the presence of novel solvent system comprising Tetrahydrofuran and water. The resulting aminoethanone is acylated with haloacetylchloride and sodium acetate in acetone-water solvent system. This product is reduced selectively first with sodium borohydride and subsequently with stannous chloride. This product is converted in situ to the corresponding hydrochloride salt immediately after reduction on its own.