Diphenylmethylidenehydrazine → HCID 58385365, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred and degassed solution of 3-bromo-5-fluoropyridine (1 g, 5.68 mmol), benzophenone hydrazone (1.23 g, 6.25 mmol) and 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (329 mg, 0.57 mmol) in anhydrous toluene (15 mL) at rt under an argon atmosphere, was added palladium acetate (128 mg, 0.57 mmol). The vessel was sealed and heated at 85° C. for 15 h. The reaction mixture was cooled to rt and partitioned between ethyl acetate and water. The organic layer was separated and washed with water, then brine, then dried over magnesium sulfate and filtered. Concentration under reduced pressure gave a brown solid which was purified via silica gel column chromatography (eluting with a gradient of 12% ethyl acetate in hexanes to 100% ethyl acetate) to afford 3-(2-(diphenylmethylene)hydrazinyl)-5-fluoropyridine (1.35 g, 82%) as a yellow solid. 1H NMR (300 MHz, DMSO-d6) δ 9.41 (s, 1H), 8.41 (s, 1H), 7.95 (s, 1H), 7.30-7.65 (m, 11H); LC-MS (ESI) m/z 292 (M+H)+.

Provenance & Evidence