Water → HCID 66679419, compound

Participants

Reaction Steps

A solution of 6-chloro-N-(4-chlorophenyl)-2-phenylpyrimidin-4-amine (XXIII) (161.87 mg, 0.51 mmol) in 1,4-dioxane (5 mL) was treated with hydrazine monohydrate (120 uL, 2.47 mmol) and stirred at room temperature for 1 hour. The reaction was then stirred at 40° C. for 135 minutes and treated with additional hydrazine monohydrate (300 uL, 6.18 mmol). Stirred with heat for 30 minutes and treated with additional hydrazine monohydrate (700 uL, 14.43 mmol). Stirred with heat for 30 minutes and treated with additional hydrazine monohydrate (1.5 mL, 30.9 mmol) and stirred for 15 minutes. Treated with hydrazine monohydrate (500 uL, 10.3 mmol, new bottle) and stirred overnight at ˜50° C. The reaction was cooled and partitioned between water and dichloromethane. The organic layer was concentrated on a rotary evaporator to yield a film (229.26 mg). The film (assumed 0.51 mmol) was treated with absolute ethanol (5 mL). The mixture was treated with a solution of with 4-trifluoromethoxybenzaldehyde (194.7 mg, 1.02 mmol) in absolute ethanol (3 mL). The mixture was treated with 3 drops of acetic acid and stirred at room temperature for 3 hours. The reaction was treated with water (35 mL) and stirred for 30 minutes. The aqueous solution was extracted 3 times with ethyl acetate. The combined organics was dried over magnesium sulfate, filtered and concentrated to yield a film. The film was taken up in chloroform and loaded onto 100 g of silica gel. The silica gel was eluted with ethyl acetate/hexanes (10%, 15%, 20%, 30%). The appropriate fractions were concentrated to yield N-(4-chlorophenyl)-2-phenyl-6-(2-(4-(trifluoromethoxy)benzylidene)hydrazinyl)pyrimidin-4-amine (Example 46) as a film (233.6 mg). ESI/MS 483.6, 485.9 (M+H), 482.0, 484.0 (M−H).

Provenance & Evidence