3-Methyl-4-[2-(trifluoromethyl)phenyl]benzoic acid → 3-Methyl-4-(4-methylthiophen-3-yl)benzoic acid

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Reaction Steps

The title compound was prepared following procedure described for Intermediate 5, step 2, but starting from methyl 3-methyl-4-(4-methyl-3-thienyl)benzoate (2.0 g; 8.12 mmol; 1 eq.), affording Intermediate 6 as a beige solid. 1H NMR: (DMSO-d6, 300 MHz) δ 12.97 (s, 1H), 7.91 (s, 1H), 7.84-7.81 (dd, J=8.12 Hz, J=1.87 Hz; 1H), 7.41 (d, J=3.20 Hz, 1H), 7.35-7.34 (m, 1H), 7.28-7.26 (d, J=7.80 Hz, 1H), 2.18 (s, 3H), 2 (s, 3H). LC/MS (Method A): 232.9 (M+H)+; 231.0 (M−H)−. HPLC (max plot) Rt 4.26 min (Purity: 99.6%).

Provenance & Evidence