4-Aminocarbonylphenylboronic acid → 4-(4-Nitroisothiazol-5-yl)benzamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-carbamoylphenylboronic acid (3Q) (157 mg, 0.96 mmol) and 5-bromo-4-nitroisothiazole (P) (200 mg, 0.96 mmol) in dioxane was bubbled was nitrogen gas for 5 min Bis(tri-tert-butylphosphine)palladium (0) (49 mg, 0.096 mmol) and 1.2M NaHCO3 water solution (241 mg, 2.9 mmol) was added and stirred at 120° C. under nitrogen atmosphere for 15 min The mixture was cooled to room temperature, diluted with ethyl acetate (50 mL), washed with water, and concentrated in vacuo at room temperature (25° C.) to afford the product 4-(4-nitroisothiazol-5-yl)benzamide (3C4) (250 mg, 96 mmol)

Provenance & Evidence