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[求助]
翻譯一小段英文的實驗操作文獻,難度很小,要求流暢。
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A solution of the crude 2,3-Benzbromarone in ethanol (10 ml) was added dropwise under nitrogen to a stirred ice-cold solution of Ethylamine gas (10.0 g, 0.32 mole) in ethanol (130 ml) during 50 min, and the mixture was stirred a t 0" for an additional 40 min. A mixture of 12 N HCl (30 ml) and ice was added to pH < 7, and the aqueous solution was extracted with ether and evaporated to dryness. The yellow solid was extracted with chloroform (4 X 50 ml), and the re- sidual Ethylamine hydrochloride was discarded. Evaporation of the chloroform filtrates gave an off-white solid, which was recrystallized twice from ethanol-acetone to give 3.4 g (17%) of 2,3-Bzrone hydrochlo- ride as off-white crystals, mp 117-119' [lit. (21) mp 116-117']; TLC in chloro-form-2-propanol-triethylamine (62:35:3) showed a single spot, Rf 0.55. 非常感謝! |
木蟲 (正式寫手)
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個人感覺難度挺大的,樓主覺得很簡單,能不能把你的翻譯貼出來交流一下? 在下不才,把自己啃哧出來的放在這,就當拋磚引玉了: 溶于10毫升乙醇的粗2,3-苯溴馬隆溶液,在50分鐘內(nèi)滴加到氮氣下攪拌冰冷的溶于130毫升乙醇的乙胺氣體(10.0克,0.32摩爾)溶液,然后該混合溶液在t 0“攪拌40分鐘。12 N鹽酸(30毫升)和冰的混合物,添加到pH<7時,溶液用乙醚提取,蒸干。黃色固體與氯仿(4×50毫升)一起提取,并丟棄剩余的乙胺化氫氯。蒸發(fā)氯仿濾液得到白色的固體,這個白色固體是由 在乙醇-丙酮添加3.4克(17%)2,3-苯鹽酸基白色晶體,兩次重結(jié)晶之后得到,熔點117-119[點亮。 (21)熔點116-117];在氯形式-2-丙醇三乙胺(62:35:3)的TLC顯示一個單一的斑點,RF0.55。 |
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