Ethyl Acetoacetate → HCID 178472848、化合物

関与物質

反応手順

To a solution of 3′-amino-2′-methoxybiphenyl-3-carboxylic acid (5 g) prepared as in Example 6, in hydrochloric acid (8.5 mL) and methanol (90 mL) was added a solution of sodium nitrite (1.41 g in 400 mL of water) at about 0° C. to about 5° C. under stirring. The reaction mixture was stirred for about 15 minutes at about 5° C. Then ethyl acetoacetate (2.7 g) was added and the reaction mixture was stirred for about 15 minutes at about 0° C. to about 5° C. Solid sodium bicarbonate (15 g) and ethanol (30 mL) was added and the reaction mixture was allowed to warm to about room temperature and stirred for about 2 hours. The mixture was filtered, washed with water (50 mL) and dried under vacuum at about 35° C. to about 40° C. for about 6 hours.

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