4-Fluorobenzaldehyde → HCID 178434624, compound

Participants

Reaction Steps

Sodium triacetoxyborohydride (36 mg, 0.160 mmol) was added in one portion to a stirred solution of the pyrazole of Example 109 (150 mg, 0.400 mmol), 4-fluorobenzaldehyde (11 mg, 0.080 mmol) and acetic acid (3 drops) in dichloromethane (15 ml) at room temperature under nitrogen. The reaction was stirred for 3 hours and then concentrated under reduced pressure. The crude product was purified by flash chromatography on silica gel eluting with dichloromethane:methanol:ammonia (90:9:1, by volume) to provide the title compound (6 mg) as a colourless oil.

Provenance & Evidence