A novel process for the preparation of 4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N-β-diphenylbenzenebutanamide also known as 2-[2-(4-fluorophenyl)-2-oxo-1-phenylethyl]-4-methyl-3-oxo-pentanoic acid phenylamide of the formula (I) containing about 0.1% or less of α-[2-methyl-1-oxopropyl]-γ-oxo-N-β-diphenylbenzene butanamide, about 0.05 % or less of difluoro -α-[2-methyl-1-oxopropyl]-γ-oxo-N-β-diphenylbenzene butanamide and about 0.1% or less of 3-[2-(4-Fluorophenyl)-2-oxo-1-phenyl-ethoxy]-4-methyl-pent-2-enoic acid phenylamide.
一种用于制备4-
氟-α-[2-甲基-1-氧代丙基]-γ-氧代-N-β-二苯基苯丁酰胺的新工艺,也被称为2-[2-(4-
氟苯基)-2-氧代-1-苯基乙基]-4-甲基-
3-氧代戊酸苯酰胺,
化学式为(I),其中含有约0.1%或更少的α-[2-甲基-1-氧代丙基]-γ-氧代-N-β-二苯基苯丁酰胺,约0.05%或更少的二
氟-α-[2-甲基-1-氧代丙基]-γ-氧代-N-β-二苯基苯丁酰胺,以及约0.1%或更少的3-[2-(4-
氟苯基)-2-氧代-1-苯基乙氧基]-4-甲基-戊-2-烯酸苯酰胺。