1,4-Cyclohexadiene → N-(2,6-dimethylphenyl)-4-[(4-phenyl-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-2-yl)amino]benzamide

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Reaction Conditions

Reaction Steps

A mixture of N-(2,6-dimethylphenyl)-4-{[4-phenyl-7-(phenylmethyl)-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-2-yl]amino}benzamide (60 mg, 0.11 mmol), prepared as described in Example 249, 1,4-cyclohexadiene (11 μL, 0.11 mmol) and 10% palladium on carbon (8 mg) in ethanol (2 mL) were heated to 80° C. overnight. Upon cooling to rt, the reaction mixture was filtered through celite and concentrated on a rotary evaporator. The resulting residue was purified by preparative reverse phase HPLC to give N-(2,6-dimethylphenyl)-4-[(4-phenyl-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-2-yl)amino]benzamide (31 mg, 62%) as a white solid. 1H NMR (400 MHz, DMSO-d6): δ 9.87 (s, 1H), 9.52 (s, 1H), 7.96 (m, 4H), 7.62 (m, 2H), 7.52 (m, 3H), 7.11 (m, 3H), 3.75 (m, 2H), 3.05 (m, 2H), 2.79 (m, 2H), 2.17 (s, 6H). MS (EI) for C28H27N5O: 450.2 (MH+).

Provenance & Evidence