Chloroacetyl chloride → HCID 58886676, compound

Participants

Reaction Conditions

Reaction Steps

7-(4-Bromo-2-fluorophenylamino)-8-chloroimidazo[1,2-a]pyridine-6-carboxylic acid hydrazide (100 mg, 0.25 mmol) of Step A, Example 35 was suspended in dichloromethane (2 mL) and 4-Me morpholine (0.040 mL, 0.36 mmol) was added. The mixture was cooled to 0° C. and then chloroacetyl chloride (0.029 mL, 0.36 mmol) was added dropwise. The reaction mixture was warmed to room temperature and stirred for 1 hour under N2. Rinsed reaction mixture into a separatory funnel with a small amount of tetrahydrofuran and methanol and then diluted with ethyl acetate. The organic layer was washed with water and saturated aqueous NaCl, dried over Na2SO4 and concentrated. Purification of the crude product was achieved by flash column chromatography (20:1 dichloromethane/methanol) to yield the desired product (64 mg, 54%) as a yellow solid. MS ESI (+) m/z 474, 476 (M+, Cl, Br pattern) detected.

Provenance & Evidence