Boron tribromide → HCID 59426398, compound

Participants

Reaction Steps

Cyclopropanecarboxylic acid [4-(3-cyano-1-ethyl-6-methoxy-1H-indol-2-ylethynyl)-phenyl]-amide (60 mg, 0.16 mmol), prepared as described in example 1Za, was stirred in BBr3 (800 μL, 1M in CH2Cl2, 0.8 mmol) at room temperature for 1 hour. The reaction mixture was quenched with H2O, and was extracted with CH2Cl2. The organic layer was dried and concentrated. Purification by silica chromatography (EtOAC) gave impure product. These crude product was triturated with 1/1 hexanes/acetone to yield cyclopropanecarboxylic acid [4-(3-cyano-1-ethyl-6-hydroxy-1H-indol-2-ylethynyl)-phenyl]-amide (32 mg, 54%) as an off-white solid.

Provenance & Evidence