药物合成反应(第三版)第一章课后翻译药物合成反应(第三版)第一章课后翻译
About 216–224 g. (1.62–1.68 moles) of powdered anhydrous aluminum
chloride is added to a 1Lthree-necked flask.在1L的三口烧瓶中加入大约
216-224g(1.62–1.68 moles)的无水三氯化铝。 While the free-flowing catalyst is
stirred (Note 3), 81 g. (0.67 mole) of acetop...
药物合成反应(第三版)第一章课后翻译
About 216–224 g. (1.62–1.68 moles) of powdered anhydrous aluminum
chloride is added to a 1Lthree-necked flask.在1L的三口烧瓶中加入大约
216-224g(1.62–1.68 moles)的无水三氯化铝。 While the free-flowing catalyst is
stirred (Note 3), 81 g. (0.67 mole) of acetophenone is added from the dropping
funnel in a slow stream over a period of 20–30 minutes. 自由流动的催化剂边搅拌边用
滴液漏斗缓慢滴加81g苯乙酰。Considerable heat is evolved, and, if the drops of ketone are not dispersed, darkening or charring occurs. 放热反应，假如滴加的酮不能被分散，
就会变黑或是碳化。When about one-third of the acetophenone has been added, the
mixture becomes a viscous ball-like mass that is difficult to stir.当三分之一的乙酰苯
被滴加，反应混合物变成一个很难搅拌的粘性的球状团块。 Turning of the stirrer by hand or more rapid addition of ketone is necessary at this point. 在这时，改用手动搅拌或快速
滴加酮是非常必要的。The addition of ketone, however, should not be so rapid as to produce a temperature above 180?. 然而，速度不能太快，当反应温度超过180?时。
Near the end of the addition, the mass becomes molten and can be stirred easily without being either heated or cooled. The molten mass, in which the acetophenone
is complexed with aluminum chloride, ranges in color from tan to brown.当快滴加完
时，团块开始融化，表明苯乙酰已经和三氯化铝混合完全，颜色也逐渐从黄褐色变为棕色。
Bromine (128 g., 0.80 mole) is added dropwise to the well-stirred mixture over a period of 40 minutes (Note 4). 在40分钟内在搅拌下把溴缓慢滴加到混合物中。After all
the bromine has been added, the molten mixture is stirred at 80–85? on a steam
bath for 1 hour.溴滴加完后，熔融混合物在80-85?蒸气浴下搅拌1小时。 The complex is
added in portions to a well-stirred mixture of 1.3 l. of cracked ice and 100 ml. of concentrated hydrochloric acid in a 2-l. beaker (Note 6).反应物加入到1.3L碎冰和
100ml浓盐酸的混合物中在2L的烧杯中混合均匀。Part of the cold aqueous layer is added to the reaction flask to decompose whatever part of the reaction mixture remains there, and the resulting mixture is added to the beaker.把部分的冰水层加入到烧瓶中
洗涤残留物，然后合并到烧杯中。 The dark oil that settles out is extracted from the mixture with four 150-ml. portions of ether 分四次把深色的油从混合物中用150ml萃取
出来。The extracts are combined, washed consecutively with 100 ml. of water and 100 ml. of 5% aqueous sodium bicarbonate solution, dried with anhydrous sodium
sulfate, and transferred to a short-necked distillation flask. 合并萃取液，用100ml
水和100ml 5%的小苏打洗涤，用无水硫酸钠干燥。The ether is removed by distillation at
atmospheric pressure, and crude 3-bromoacetophenone is stripped from a few grams of heavy dark residue by distillation at reduced pressure. 乙醚在常压下蒸馏，
微量的溴苯乙酮通过减压蒸馏的方法从大量深色残渣中被分离出来。The colorless distillate is
carefully fractionated to obtain 94–100 g.通过分馏，得到无色的流出液94-100g
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