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yidiniaoren

铜虫 (正式写手)

[求助] 翻译求助,英译汉,关于三氯蔗糖合成方面的

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. (25-30C) and adjusted the pH of soln. to 8 to 10 give clear soln.  The reaction mixt. was stirred at ambient temp. (25-30C) 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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zou-yanhua

金虫 (小有名气)

【答案】应助回帖


爱与雨下(金币+1): !~ 2011-08-22 12:19:21
yidiniaoren(金币+15, 翻译EPI+1): 谢谢~~ 2011-08-22 12:27:42
在25-30C的条件下,将0.1ml的DBU加入到搅拌着的TOPSA甲醇溶液(10gTOPSA,100ml甲醇)中,调节溶液得ph到8-10直至溶液澄清。保持反应体系温度在25-30C下搅拌2小时。然后用磺酸阳离子树脂中和并调节ph到6.8- 7.0。将树脂滤出,溶剂挥发后残留物用20ml的乙酸乙酯重结晶,产物在45C 下干燥6小时后得到5.2g三氯蔗糖。
2楼2011-08-22 12:16:32
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