The present invention describes a novel process for the preparation of (6S)-(−)-5,6,7,8-tetrahydro-6-[propyl-(2-thienyl)ethyl]amino-1-naphthol (Rotigotine) comprising: (a) acetylating (S)-(−)-5-hydroxy-N-n-propyl-2-aminotetraline to afford the acetate; (b) reacting this acetate, (−)-5-acetoxy-N-n-propyl-2-aminotetraline, with 2-(2-thienyl)ethanol 2-nitrobenzenesul-fonate; (d) hydrolyzing (6S)-(−)-1-acetoxy-5,6,7,8-tetrahydro-6-[propyl-(2-thienyl)ethyl]amino-1-naphthalene to afford (6S)-(−)-5,6,7,8-tetrahydro-6-[propyl-(2-thienypethyl]amino-1-naphthol (Rotigotine) and (d) purifying rotigotine either by the acetylation reaction and subsequent hydrolysis of the formed acetate or by salification of rotigotine through hydrochloride or hydrobromide formation and subsequent base release. Rotigotine is a dopamine agonist and is indicated for the treatment of Parkinson's disease.
本发明描述了一种制备(6S)-(-)-5,6,7,8-四氢-6-[丙基-(2-
噻吩基)乙基]
氨基-1-
萘酚(罗地克汀)的新工艺,包括:(a) 乙酰化(S)-(-)-5-羟基-N-丙基-2-
氨基四氢
萘以得到
乙酸酯;(b) 将这种
乙酸酯,(-)-5-乙酰氧基-N-丙基-2-
氨基四氢
萘与2-(2-
噻吩基)
乙醇2-硝基苯磺酸盐反应;(c) 加
水解(6S)-(-)-1-乙酰氧基-5,6,7,8-四氢-6-[丙基-(2-
噻吩基)乙基]
氨基-1-
萘烷以得到(6S)-(-)-5,6,7,8-四氢-6-[丙基-(2-
噻吩基)乙基]
氨基-1-
萘酚(罗地克汀);(d) 通过乙酰化反应和随后的
乙酸酯
水解或通过
盐酸或
溴化氢的形式制得罗地克汀的盐酸盐或
溴化物盐并随后释放碱来纯化罗地克汀。罗地克汀是一种
多巴胺激动剂,适用于帕
金森病的治疗。