反应详情

By following the procedure of Example 1 by employing 4.22 g(27.4 mmole) of 2,4-dihydroxybenzoic acid, 1.1 g (27.5 mmole) of sodium hydroxide and 4 g(24.9 mmole) of chlorokojic acid, there was obtained 5.7 g(85.3%) of 2-(3,4-dihydroxybenzoyl)oxymethyl-5-hydroxy-4H-pyran-4-one as a solid.