急！一段英文合成文献，很深奥，谁能解一下？ in a screw-top vessel （有旋盖的反应瓶？）with a teflon o-ring（聚四氟乙烯o圈？什么东西） was placed the hydroxylamine 8a (0.67 g, 1.85 mmol) and 2-methyl-2-propanol(3 ml). 这个句子是我是这么理解的： 在带有特富龙o形圈的具螺纹反应瓶中加入羟胺8a和2-甲基-2-丙醇 liquid nh3(2 ml )(这个怎么搞定啊？请指教) was condensed using a cold finger （？？？）(dry ice/acetone) into the cooled (-78 度) reaction vessel. （上面这步用液氨加料的实在不理解，请赐教）the vessel was sealed, the ice bath was removed, and the reaction mixture was allowed to stir at rt for 2 h 指形冷冻管用干冰丙酮浴冷却，然后用指形冷冻管吸取2ml液氨加入已经冷至-78的反应瓶中，反应瓶密封后，撤去冰浴，反应混合物在室温下搅拌反应2小时 the reaction mixture was then placed in the refrigerator overnight. the vessel was then recooled to -78 度 and opened. the ice bath was removed, the reaction mixture was allowed to come to rt, and the nh3 was allowed to evaporate. 反应混合物放置冰箱过夜，然后反应瓶重新冷至-78，然后打开密封，撤去冰浴，将反应混合物放置室温，挥发去氨气。 查看更多
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