反应详情

温度

70 °C

In 20 ml of phosphate buffer (pH 6.4) is dissolved 1.0 g of 7-[2-(2-imino-3-hydroxy-4-thiazolin-4-yl)acetamido]-3-acetoxymethyl-3-cephem-4-carboxylic acid together with 0.3 g of 3-hydroxymethyl-4-methyl-1,2,4-triazole-5-thiol and 0.336 g of sodium hydrogen carbonate and the solution is stirred at 70° C. for 2 hours. This reaction mixture is subjected to column chromatography on polystyrene resin (Amberlite XAD-2) with water as the developer and the fractions containing the contemplated product are pooled. This solution contains 3-hydroxymethyl-4-methyl-1,2,4-triazole-5-thiol together with the desired compound. The solution is lyophilized and the resultant powder is redissolved in water. The solution is then subjected to column chromatography on dextran gel (Sephadex LH-20®, Pharmacia) with water as the developer. The fractions containing the contemplated compound are pooled and lyophilized. By the above procedure is obtained the captioned compound. Yield 0.28 g.

1. additionthe fractions containing the contemplated product