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anjchem

新虫 (小有名气)

[求助] 翻译一小段英文的实验操作文献,难度很小,要求流畅。

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.

非常感谢!
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flame95

木虫 (正式写手)

【答案】应助回帖

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Mally89: 金币+1 2012-04-14 13:34:43
sltmac: 金币+30, 翻译EPI+1 2012-04-19 10:13:20
个人感觉难度挺大的,楼主觉得很简单,能不能把你的翻译贴出来交流一下?
在下不才,把自己啃哧出来的放在这,就当抛砖引玉了:

溶于10毫升乙醇的粗2,3-苯溴马隆溶液,在50分钟内滴加到氮气下搅拌冰冷的溶于130毫升乙醇的乙胺气体(10.0克,0.32摩尔)溶液,然后该混合溶液在t 0“搅拌40分钟。12 N盐酸(30毫升)和冰的混合物,添加到pH<7时,溶液用乙醚提取,蒸干。黄色固体与氯仿(4×50毫升)一起提取,并丢弃剩余的乙胺化氢氯。蒸发氯仿滤液得到白色的固体,这个白色固体是由 在乙醇-丙酮添加3.4克(17%)2,3-苯盐酸基白色晶体,两次重结晶之后得到,熔点117-119[点亮。 (21)熔点116-117];在氯形式-2-丙醇三乙胺(62:35:3)的TLC显示一个单一的斑点,RF0.55。
2楼2012-04-05 20:29:35
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