20110060164 | METHOD FOR THE PREPARATION OF 4-FLUORO-ALPHA-[2-METHYL-1-OXOPROPYL]-GAMMA-OXO-N-BETA-DIPHENYLBENZENEBUT- ANAMIDE AND PRODUCTS THEREFROM - A method 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. | 03-10-2011 |