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yidiniaoren铜虫 (正式写手)
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[求助]
翻译求助，英译汉，关于三氯蔗糖合成方面的
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| DBU (0.1ml) was added to a stirred soln. of 4,1'6'-trichloro-4,1',6'-trideoxy galaactosucrose penta-acetate (TOPSA) (10g) in methanol (100mL) at ambient temp. (25-30C) and adjusted the pH of soln. to 8 to 10 give clear soln. The reaction mixt. was stirred at ambient temp. (25-30C) for 2 h. The reaction mixt. is then neutralized with sulfonic acid cation resin and adjusted pH 6.8 to 7.0 at ambient temp. The resin is filtered off. Solvent is evapd. from the filtrate to give residue which is recrystd. from Et acetate (20mL). The product is dried at 45 C for 6 h to give Sucralose (5.2g). |
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2楼2011-08-22 12:16:32