作者:M. Carmen Carreño、Marcos González-López、Alfonso Latorre、Antonio Urbano
DOI:10.1021/jo060688j
日期:2006.6.1
Two alternative routes are described for the synthesis of 8-aryl-2-tetralones (1). Route A starts from alpha-tetralone 3 and involves 3 or 4 steps, with the selective Na-EtOH reduction of 1-aryl-7-methoxynaphthalenes 2 being the key step. The exclusive reduction of the A ring of naphthalenes 2 occurs when the aryl group at C-1 has no substituent at the ortho positions, affording tetrahydronaphthalenes 11. Reduction of the B ring of 2 becomes the major process when the aryl fragment has two substituents at the ortho positions, affording 8-aryl-2-tetralones 1 as the major component. Route B involves 5 steps starting from 2-tetralone 5, with the key step being the Suzuki coupling with triflate 4. This approach allows the synthesis of 8-aryl-2-tetralones 1 with no substituent at the ortho positions of the aryl fragment and with naphthalene and anthracene rings at C-8.
[EN] PROCESS FOR THE MANUFACTURE OF AGOMELATINE AND ITS INTERMEDIATE<br/>[FR] PROCESSUS DE FABRICATION D'AGOMÉLATINE ET DE SON INTERMÉDIAIRE
申请人:NHWA PHARMA CORP
公开号:WO2010012208A1
公开(公告)日:2010-02-04
The process for the manufacture of agomelatine and its intermediate N-[2-(7-methoxy-1-naphthyl)-ethyl]phthalimide comprises 7-methoxy-1-naphthyl ethanol(III) reacting with benzene sulfonyl chloride to obtain 7-methoxy-1-naphthyl-ethyl benzene sulfonate(IV), then IV reacting with potassic salt of phthalimide to produce N-[2-(7-methoxy-1-naphthyl)-ethyl]phthalimide (II), which being hydrolyzed under alkali, then being acetylated to obtain agomelatine.