3-Chloro-4-fluoroaniline → HCID 58314336, compound

Participants

Reaction Conditions

Reaction Steps

To tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropylmethyl)carbamate (50 mg, 0.14 mmol) in 1 mL of 1,4 dioxane was added cesium carbonate (65 mg, 0.2 mmol), Pd (OAc)2 (4 mg, 0.006 mmol), (+)-BINAP (5 mg, 0.009 mmol), 3-chloro-4-fluoroaniline (31 mg, 0.21 mmol). The reaction mixture was heated in microwave at 110° C. for 20 minutes. The mixture was then cooled to room temperature, water was added, and the product was extracted with ether. The organic layer was then concentrated under reduced pressure and the crude product was dissolved in 1:1 mixture of dichloromethane and trifluoroacetic acid at room temperature for 1 hour. The reaction mixture was concentrated with 10 mL of dichloromethane. To the reaction mixture, ether/hexanes (1:1) was added and the flask was sonicated for 10 minutes then filtered to obtain the yellow precipitate. The precipitate was washed with hexane to yield 5-(3-chloro-4-fluorophenylamino)-7-(cyclopropylmethylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde. LCMS (M+1=460)

Provenance & Evidence