PROCESS FOR THE MANUFACTURE OF AGOMELATINE AND ITS INTERMEDIATE
申请人:Zhang Guisen
公开号:US20110130571A1
公开(公告)日:2011-06-02
A process for the manufacture of agomelatine and its intermediate N-[2-(7-methoxy-1-naphthyl)ethyl]phthalimide is provided and includes reacting 7-methoxy-1-naphthyl ethanol (III) with benzenesulfonyl chloride to obtain 7-methoxy-1-naphthylethyl benzene sulfonate (IV), which is reacted with potassium phthalimide to produce N-[2-(7-methoxy-1-naphthyl)ethyl]phthalimide (II); and subjecting N-[2-(7-methoxy-
1
-naphthyl)ethyl]phthalimide (II) to alkaline hydrolysis and acetylation, to obtain agomelatine.
Solvothermal treatment of 1-naphthylmethylamine with potassium hydride (KH) or n-butyllithium (n-BuLi)–potassium t-butoxide (t-BuOK) in THF induces unusual two consecutive β-hydride eliminations to form 1-naphthonitrile and KH. The freshly generated KH is hydridic enough to undergo dearomative hydride addition to the resultant 1-naphthonitrile regioselectively at the C4 position to afford α-cyano benzylic