Hydrochloric Acid → HCID 67439350, compound

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Reaction Steps

A mixture of 5-(4-cyano-3-hydroxyphenoxy)-1,3-dihydro-1-hydroxy-2,1-benzoxaborole (900 mg, 3.37 mmol), acetic anhydride (1.7 mL, 18 mmol), triethylamine (1.4 mL, 10 mL) in N,N-dimethylformamide (10 mL) was stirred at room temperature overnight. The mixture was acidified with 1 M HCl and extracted with ethyl acetate. The organic layer was washed with brine and dried on anhydrous sodium sulfate. The solvent was removed under reduced pressure and the residue was purified by silica gel chromatography (1:1 hexane/ethyl acetate) to give 5-(4-cyano-3-acetoxyphenoxy)-1,3-dihydro-1-hydroxy-2,1-benzoxaborole (818 mg, 79%).

Provenance & Evidence