药物合成反应课后翻译.docx

1、药物合成反应课后翻译1、About 216224 g. (1.621.68 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(1.621.68 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 str

2、eam over a period of 2030 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 th

3、at 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

4、 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

5、 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 8085 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

6、 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 b

7、eaker.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

8、 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

9、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 94100 g.通过分馏，得到无色的流出液94-100g2、反应式：3、2-Methyl-4-ethoxalylcyclopentane-1,3,5-trione. A solution of sodium ethoxide is prepared in a 2-l. three-necked, round-bottomed flask fitted with a mercury-sealed stirrer, a r

10、eflux condenser carrying a drying tube, and a stopper by the addition of 69.0 g. (3 moles) of sodium to 950 ml. of absolute ethanol. 69.0g（3mol）钠和950ml无水乙醇在配有干燥回流冷凝管和汞封搅拌器的2L三口圆底烧瓶中制备乙醇钠。The solution is cooled to 05 in an ice bath and stirred.溶液在0-5下冰浴搅拌。 The stopper is replaced by a dropping funnel

11、, and a cold mixture (515) of 108 g. (1.50 moles) of freshly distilled 2-butanone and 482 g. (3.30 moles) of diethyl oxalate (Note 1) is added gradually over a period of 30 minutes.瓶塞用分液漏斗取代，108g（1.5mol）的丁二酮和482g（3.3mol）的乙二酸二乙酯在5-15下低温混合，在30分钟内逐步滴加到溶液中。 After the addition is complete, the thick, ora

12、nge-red mixture is allowed to warm with continued stirring to room temperature, heated under reflux for 30 minutes, and cooled again to 0 in an ice bath. 完全加入后，橘红色的粘稠物继续搅拌至室温，加热回流30分钟后在冰浴中冷却至0。The mixture is decomposed by stirring with 165 ml. of sulfuric acid (1:1 by volume) added in portions.将165m

13、l浓硫酸（体积比1:1）在搅拌加入，分解混合物。 The sodium sulfate formed is filtered by suction and washed with ethanol (150200 ml.) (Note 2). 硫酸钠抽滤后用乙醇（150200 ml）洗涤。The washings and filtrate are combined and concentrated by evaporation .合并滤液和洗涤液后蒸发浓缩。The yellowish brown product which accumulates by slow crystallization

14、is collected by filtration, washed with small quantities of ice-cold water, and dried in air. 过滤缓慢析出的棕黄色产品用小剂量的冰水洗涤后在空气中干燥。 The crude product weighs 140150 g.粗产品140-150g。 Further evaporative concentration of the mother liquor followed by cooling furnishes an additional 4050 g. of the keto ester, 此外将

15、母液用冷冻蒸发浓缩后又得到40-50g的酮酯。bringing the total yield to 180200 g. (5359%)产品总共180-200g（产率53-59%） (Note 2). This crude material (m.p. 120130) is used in the next step.粗品（熔点120130）用于下一步中 A pure sample can be obtained by crystallization from ethyl acetate after treatment with Norit activated carbon, m.p. 160

16、162.纯品是经过活性炭处理后在乙酸乙酯中结晶得到，熔点160162。The procedure for 2- pyrrolealdehyde 2-吡咯甲醛In a 3-l. three-necked round-bottomed flask, fitted with a sealed stirrer, a dropping funnel, and a reflux condenser, is placed 80 g. (1.1 moles) of dimethylformamide (Note 1).在配有封闭搅拌器、滴液漏斗和冷凝回流装置的三口圆底烧瓶中放入80g（1.1mol）的二甲基甲

17、酰胺。 The flask is immersed in an ice bath, and the internal temperature is maintained at 1020, while 169 g. (1.1 moles) of phosphorus oxychloride is added through the dropping funnel over a period of 15 minutes. 烧瓶浸入冰浴中，内部温度保持在10-20，169g（1.1mol）的磷酰氯通过滴液漏斗在15分钟内滴加。An exothermic reaction occurs with th

18、e formation of the phosphorus oxychloride - dimethylformamide complex. 放热反应生成磷酰氯二甲基甲酰胺化合物。The ice bath is removed, and the mixture is stirred for 15 minutes (Note 2). 移去冰浴，在搅拌15分钟。The ice bath is replaced, and 250 ml. of ethylene dichloride is added to the mixture. 重新再冰浴下加入250ml的二氯乙烯。When the intern

19、al temperature has been lowered to 5, a solution of 67 g. (1.0 mole) of freshly distilled pyrrole in 250 ml. of ethylene dichloride is added through a clean dropping funnel to the stirred, cooled mixture over a period of 1 hour. 当内部温度降到5度时，把67g（1.0mol）新蒸馏的吡咯加入到250二氯乙烯中，通过滴液漏斗在1小时内低温下边搅拌边滴加。After the

20、 addition is complete, the ice bath is replaced with a heating mantle, and the mixture is stirred at the reflux temperature for 15 minutes, during which time there is copious evolution of hydrogen chloride.滴加完后，用加热装置取代冰浴，搅拌回流15分钟， 直到有大量氯化氢产生。The mixture is then cooled to 2530, and to it is added thr

21、ough the dropping funnel a solution of 750 g. (5.5 moles) of sodium acetate trihydrate (Note 3) in about of water, cautiously at first, then as rapidly as possible. 当混合物降温到25-30后，通过滴液漏斗加入750g（5.5mol）的三水醋酸钠溶液，开始要小心，然后要尽可能地快。The reaction mixture is again refluxed for 15 minutes, vigorous stirring bein

22、g maintained all the while (Note 4). 反应物在充分搅拌下重新回流15分钟。The cooled mixture is transferred to a 3-l. separatory funnel, and the ethylene dichloride layer is removed. 冷却的混合物转移到分液漏斗中，出去二氯乙烯层。The aqueous phase is extracted three times with a total of about 500 ml. of ether. 水相用500ml乙醚分三次萃取。The ether and

23、ethylene chloride solutions are combined and washed with three 100-ml. portions of saturated aqueous sodium carbonate solution, which is added cautiously at first to avoid too rapid evolution of carbon dioxide.合并乙醚和氯乙烯溶液，用100ml饱和碳酸钠溶液分三次洗涤，然后通入二氧化碳，通入时要小心不要太快。 The non- aqueous solution is then dried

24、 over anhydrous sodium carbonate, the solvents are distilled, and the remaining liquid is transferred to a Claisen flask and distilled from an oil bath under reduced pressure (Note 5). 非水溶液用无水碳酸钠干燥，蒸馏溶剂，余下的溶液移入克氏烧瓶在油浴中减压蒸馏。The aldehyde boils at 78 at 2 mm.; there is very little fore-run and very lit

25、tle residue. 醛沸点78度在2mm；很少有预留无和残渣。The yield of crude 2-pyrrolealdehyde is 8590 g. (8995%), as an almost water-white liquid which soon crystallizes. 当几乎透明的液体会马上结晶，粗品产量85-90g（89-95%）。A sample dried on a clay plate melts at 3540. 样品在素烧瓷板上干燥，熔点35-40度。The crude product is purified by dissolving in boilin

26、g petroleum ether (b.p. 4060), in the ratio of 1 g. of crude 2-pyrrolealdehyde to 25 ml. of solvent, and cooling the solution slowly to room temperature, followed by refrigeration for a few hours.粗品溶解在沸腾的石油醚中（沸点40-60度），一克粗品2-甲基吡啶加入25ml溶剂，在室温下冷却，这后再冷冻数小时。 The pure aldehyde is obtained from the crude

27、in approximately 85% recovery.纯品醛是从粗品中得到，收率85%。 The over-all yield from pyrrole is 7879% of pure 2-pyrrolealdehyde, m.p. 4445. 总得率为78-79%熔点44-45度。（1）反应式4、(1)In a 3L. round-bottomed flask (Note 1) fitted with a reflux condenser are placed 625 cc. of 95 per cent alcohol (Note 2), 500 cc. of water, 500

28、 g. (476 cc., 4.7 moles) of pure benzaldehyde (Note 3), and 50 g. of sodium cyanide (9698 per cent). 在配有回流冷凝器的3L圆底烧瓶中加入625ml的95%酒精、500ml水、500g（476ml，4,7mol）的苯甲醛和50g 96-98%的氰化钠。The mixture is then heated and kept boiling for one-half hour (Note 4). 混合物加热并保持沸腾1.5小时。In the course of about twenty minute

29、s, crystals begin to separate from the hot solution. 在20分钟后晶体开始从热溶液中析出。At the end of the thirty minutes, the solution is cooled, filtered with suction, and washed with a little water. 在最后的30分钟，冷却溶液，抽滤并用少量水洗涤The yield of dry crude benzoin, which is white or light yellow, is 450460 g.有450-460g白色或亮黄色的干

30、燥的安息香。 (9092 per cent of the theoretical amount). 理论产率90-92%。In order to obtain it completely pure, the crude substance is recrystallized from 95 per cent alcohol, 90 g. of crude material being dissolved in about 700 cc. of boiling alcohol; upon cooling, a yield of 83 g. of white, pure benzoin which

31、 melts at 129 is obtained.为了得到纯度高的产品，粗产品要在酒精中重结晶，90g粗品溶解在700ml沸腾的酒精中，冷却， 得到83g熔点为129摄氏度的白色安息香纯品。(2)In a 1L. three-necked round-bottomed flask equipped with a mechanical stirrer, short reflux condenser, and bent glass tube reaching below the surface of the liquid for the introduction of hydrogen chlo

32、ride, are placed 50 g. (0.36 mole) of p-nitrophenol (Note 1), 650 ml. of concentrated hydrochloric acid, 5 ml. of concentrated sulfuric acid (Note 2), and 76 g. (1 mole) of methylal (Note 3). 在配有机械搅拌，短期冷凝回流器和一个为的是深入液面下通氯化氢气体的弯曲的玻璃管三口圆底烧瓶中加入50g（0.36mol）对硝基苯酚，650ml的浓盐酸，5ml的浓硫酸和76g（1mol）的二甲氧基甲烷。The mix

33、ture is stirred while the temperature is maintained at 70 2 for 45 hours by means of a water bath (Note 4). 在水浴中保持702度搅拌4-5小时。During this time hydrogen chloride is bubbled into the reaction mixture through the bent glass tube, and the excess gas is carried away through the reflux condenser to a hood