A process for preparing (S)-(−)-N-[4-[4-[ethyl(6-fluoro-6-methylheptyl)amino]-1-hydroxylphenyl]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-methylheptyl)amino]-1-hydroxylphenyl]methanesulfonamide(I) and then converting I into the hemifumarate salt Ia. A process for preparing IIa is also claimed as well as intermediates IIa-IId.
一种制备(S)-(-)-N- [4- [4- [乙基(6-
氟-6-甲基庚基)
氨基] -1-羟基苯基]
甲烷磺酰胺半
富马酸盐的方法,包括在三乙酰氧
硼氢化钠和
乙酸乙酯的存在下,将N- [4- [(2S) -四氢-5-羟基-2-
呋喃基]苯基]
甲烷磺酰胺(IIa)与
氟胺(III)反应,以提供[4- [-4- [乙基(6-
氟-6-甲基庚基)
氨基] -1-羟基苯基]
甲烷磺酰胺(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-IId。