反应详情

Following the process described in example 1 (point B), by hydrogenating for 4 h 8-nitro-4-oxo-2-(5-1H-tetrazolyl)-4H-1-benzopyran (0.896 g, 3.46 mmol) with 5% palladium-on-charcoal (91 mg) in a mixture of methanol (65 ml), chloroform (20 ml) and concentrated hydrochloric acid (2 ml), the title compound was prepared as its corresponding hydrochloride (quantitative yield).