Method for the preparation of 4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N-β-diphenylbenzenebutanamide and products therefrom
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United States of America Patent
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Apr 24, 2012
Grant Date -
Mar 10, 2011
app pub date -
Nov 11, 2010
filing date -
May 29, 2008
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Abstract
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.
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