N-methyl-2-[1-[[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]-4-piperidinyl]-N-[(1R,4S)-1,2,3,4-tetrahydro-4-hydroxy-1-naphthalenyl]-4-thiazolecarboxamide → N-methyl-2-[1-[[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]-4-piperidinyl]-N-(1,2,3,4-tetrahydro-4-oxo-1-naphthalenyl)-4-thiazolecarboxamide

Participants

Reaction Steps

A mixture of N-methyl-2-[1-[[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]-4-piperidinyl]-N-[(1R,4S)-1,2,3,4-tetrahydro-4-hydroxy-1-naphthalenyl]-4-thiazolecarboxamide and its enantiomer (96 mg, 0.17 mmol) (i.e. the product of Example 26, Step B) and manganese dioxide (400 mg, 4.6 mmol) in chloroform (2 mL) were swirled to form a vortex overnight at room temperature. The reaction mixture was filtered through Celite® diatomaceous filter aid, and purified by medium-pressure liquid chromatography on silica gel using 20% acetone in ethyl acetate as eluant to give 70 mg of the title compound, a compound of the present invention as a white foam.

Provenance & Evidence