A process for preparing (S)-(-)-N-[4-[4-[ethyl(6-fluoro-6-methylheptyl)amino]-1-hydroxy]phenyl]methanesulfonamide hemifumarate salt, which comprises reacting N-[4[(2S)-tetrahydro-5-hydroxy-2-furanyl]phenyl]methanesulfonamide (IIa) with fluoroamine (III) in the presence of triacetoxyborohydride and ethyl acetate to provide [4-[4-[ethyl(6-fluoro-6-metylheptyl)amino]-1-hydroxy]phenyl]methanesulfonamide (I) anll then converting I into the hemifumarate salt Ia. A process for preparing IIa is also claimed as well as intermediates IIa-lId.
一种制备(S)-(-)-N-[4-[4-[乙基(6-
氟-6-甲基庚基)
氨基]-1-羟基]苯甲磺酰胺半
富马酸盐的方法,包括在三乙酰氧
硼氢化钠和
乙酸乙酯存在下,将N-[4-(2S)-四氢-5-羟基-2
呋喃基]苯甲磺酰胺(IIa)与
氟胺(III)反应,得到[4-[4-[乙基(6-
氟-6-甲基庚基)
氨基]-1-羟基]苯甲磺酰胺(I),然后将I转化为半
富马酸盐Ia。还声明了制备IIa的方法以及中间体IIa-lId。