反应详情

Under the conditions of example 16K, 6.5 g of 3-(3-methoxy-6-methoxycarbonyl-2-pyridyl)-propionic acid methyl ester in 60 ml of 48% hydrobromic acid is reacted and worked up. 4.1 g of 3-(6-carboxy-3-hydroxy-2-pyridyl)-propionic acid of melting point 210°-212° C. is obtained.