| 查看: 392 | 回复: 1 | ||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||
[求助]
求翻译以下一段话！谢谢！材料化学类的
|
||
|
Compound2(6.0 g, 9.010 3 mol) was dissolved in anhydrous THF (100 mL) andn-butyllithium (2.2 M/hexane, 6 mL, 0.0132 mol) was added, dropwise, under an argon atomosphere at 78 C. After stirring for 5 h, B(OCH3)3 (2.2 mL) was added quickly at78 C and the mixture was stirred overnight allowing the temperature to rise gradually to room temperature. Then, the reaction mixture was acidified with hydrochloric acid (2 M) for 2 h. The mixture was extracted with dichloromethane (3 50 mL) and the organic layer was dried with anhydrous sodium sulfate. After removing the solvent under reduced pressure, the crude product was purified by silica gel column chromatography using acetone/CH2Cl2 (1 : 20, v) as eluent to yield 3(2.1 g, yield 55%). 1 H-NMR (300 MHz, DMSO-d6) d: 7.137 (s, 1H, >C]CH–), 7.25–7.58 (m, 16 H), 7.62–7.78 (m, 8 H), 7.976 (s, 2 H, –B(OH)2), 8.20–8.30 (m, 4 H, carbazole–H); MS (EI),m/ z: 586 ([M-(B(OH)2)] + , calcd for C44H29, 585); anal. calc. For C44H31BN2O2: C 83.81, H 4.96, N 4.44; found: C 83.64, H 4.89, N 4.48. |
回复此楼» 猜你喜欢
投稿Elsevier的Neoplasia杂志，到最后选publishing options时页面空白，不能完成投稿
已经有22人回复
-
申请26博士
已经有5人回复
-
职称评审没过，求安慰
已经有22人回复
-
垃圾破二本职称评审标准
已经有15人回复
-
EST投稿状态问题
已经有7人回复
-
毕业后当辅导员了，天天各种学生超烦
已经有4人回复
-
聘U V热熔胶研究人员
已经有10人回复
-
求助文献
已经有3人回复
-
投稿返修后收到这样的回复，还有希望吗
已经有8人回复
-
三无产品还有机会吗
已经有6人回复
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
真强必胜: 金币+1, 谢谢 2014-11-11 19:02:59
清风拂梦: 金币+10, ★★★很有帮助 2014-11-18 00:04:53
真强必胜: 金币+1, 谢谢 2014-11-11 19:02:59
清风拂梦: 金币+10, ★★★很有帮助 2014-11-18 00:04:53
|
化合物2（6.0克，9.010 3 摩尔）溶于无水四氢呋喃（100毫升）中，冷却至-78摄氏度，然后正丁基锂（2.2 M的正丁烷溶液, 6 毫升, 0.0132 摩尔）在氩气保护下在-78摄氏度下滴入上述溶液中。然后搅拌5小时，硼酸三甲酯（2.2毫升）在-78度下快速加入，反应混合物慢慢升至室温，搅拌过夜。然后混合物用2M的盐酸酸化2小时。然后反应混合物用二氯甲烷摄取三次（每次用50毫升），有机相用无水硫酸钠干燥。有机溶剂减压蒸馏除掉，粗品用硅胶柱纯化（流动相：丙酮：二氯甲烷=1：20 体积比）得到3（2.1克，收率：55%），氢谱（300兆，氘化二甲亚砜作溶剂）：d: 7.137 (s, 1H, >C]CH–), 7.25–7.58 (m, 16 H), 7.62–7.78 (m, 8 H), 7.976 (s, 2 H, –B(OH)2), 8.20–8.30 (m, 4 H, carbazole–H)；质谱：m/ z: 586 ([M-(B(OH)2)] + , 计算值C44H29, 585); 元素分析：计算值C44H31BN2O2: C 83.81, H 4.96, N 4.44; 测得值: C 83.64, H 4.89, N 4.48. |
2楼2014-11-11 09:23:47