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趙君紅銅蟲 (初入文壇)
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[求助]
本科論文，關(guān)于合成，只翻譯一段摘要，求蟲友幫忙，感謝
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| 本實(shí)驗(yàn)以A為原料，乙醇為溶劑，80℃條件下，加保險(xiǎn)粉、硫氫化鈉發(fā)生取代和還原反應(yīng)，生成B。然后在70℃與甲醇發(fā)生關(guān)環(huán)反應(yīng)，生成C。以CsCO3、CuI、Pd(Pph3)4、為催化劑，DMF為溶劑將上步產(chǎn)物與碘苯在120℃條件下發(fā)生取代反應(yīng)，生成D。然后用二氯甲烷溶解產(chǎn)物，在室溫條件與MCPBA發(fā)生氧化反應(yīng)，活化吡啶環(huán)，最后將活化產(chǎn)物在115℃與三氯氧磷回流，對(duì)吡啶環(huán)四位進(jìn)行取代，生成終產(chǎn)物E。 |
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shiranjiang
金蟲 (正式寫手)
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【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
趙君紅: 金幣+25, 翻譯EPI+1 2014-06-16 18:10:21
趙君紅: 金幣+25, 翻譯EPI+1 2014-06-16 18:10:21
| A was used to be the raw material,ethyl alcohol was used as the solvent in this experiment,under the condition of 80 ℃, substitution and reduction reaction occured to generate B when adding sodium hydrosulfite and sodium hydrosulphide.Then,ring-formation reaction took place with methyl alcohol at 70 ℃ and C was generated.Substitution reaction occured under the condition of 120 ℃ to generate D by the product generated last step and iodobenzene when taking CsCO3, CuI, Pd (Pph3) 4 as the catalyst,DMF as the solvent.Then oxidation reaction took place with MCPBA and the product dissolved by dichloromethane at room temperature,activating the pyridine ring, finally backflow happened by using activation product and phosphorus oxychloride at 115 ℃,replacing the pyridine ring four and the end-product E was generated. |
2樓2014-06-16 15:51:31
【答案】應(yīng)助回帖
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趙君紅: 金幣+25 2014-06-16 18:10:26
趙君紅: 金幣+25 2014-06-16 18:10:26
| this experiment involves reacting A with hydrosulfite and sodium hydrosulfide in the presence of ethanol solution at 80℃，B is prepared though a substitution and reduction reaction. then C is obtained through a process of cyclization by B and methanol. the newly formed product is further reacting with iodobenzene at 120℃ by a substitution reaction to give D. to obtain an activation of pyridine ring, D is dissolved in dichloromethane and further occurring an oxidation reaction with MCPBA. the final activation production is fluxed with phosphorus oxychloride at 115℃ and undergoing a substitution reaction at the 4-position of pyridine to give the final product E. |
3樓2014-06-16 16:50:17
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