 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 3 | 1/1 | 返回列表 |
| 查看: 455 | 回復(fù): 2 | |||
清風(fēng)拂夢(mèng)新蟲 (小有名氣)
|
[求助]
求大神翻譯下下面兩段話，有機(jī)化學(xué)類的，謝謝……
|
|
Realizing the importance of polyhydroquinoline derivatives, severalsynthesis methods have been reported, like conventional heating [7],refluxing in acetic acid [8] and microwave irradiation [9] and ultrasound[10]. Different other approaches for the syntheses of polyhydroquinolinederivatives using various catalysts, such as TMSCl [11], ionic liquids[12,13], L-proline [14], polymers [15], Yb(OTf)3[16], Sc(OTf)3[17],HClO4–SiO2[18], cerric ammonium nitrate [19], heteropoly acid [20],p-TSA [21], HY-zeolite [22] and Mont. K10 [23] have also been reportedand some of the methods are associated with several shortcomingssuch as long reaction times, expensive reagents, harsh reaction condi-tions, low-product yields and the use of large quantity of volatile organic solvents. In recent years, heterogeneous catalysts are gaining more impor-tance due to environmental and economic factors. The efficiency canbe improved by using nanosized catalysts because of their small sizeand large surface to volume ratio. It has been observed that Ni0-nanoparticles as catalysts offer great attention for a wide range of appli-cations in organic transformations such as chemo-selective oxidativecoupling of thiols [24], reduction of aldehydes and ketones [25–27], hy-drogenation of olefins [28] and support for hydrogen adsorption [29].Recently, the progress in the field of solvent-free reactions is gainingsignificance because of their high efficiency, operational simplicity andenvironmentally benign processes. The multi-component reactions are powerful tools in the modern drug discovery process and allow fast, automated and high throughput generation of organic compounds.The possibility of performing multi-component reactions undersolvent-free conditions with a heterogeneous catalyst could enhancetheir efficiency from an economic as well as an ecological point of view. |
回復(fù)此樓» 猜你喜歡
一志愿武理材料工程348求調(diào)劑
已經(jīng)有6人回復(fù)
-
08工科 320總分 求調(diào)劑
已經(jīng)有11人回復(fù)
-
一志愿華中農(nóng)業(yè)071010，總分320求調(diào)劑
已經(jīng)有6人回復(fù)
-
323求調(diào)劑
已經(jīng)有5人回復(fù)
-
284求調(diào)劑
已經(jīng)有5人回復(fù)
-
317求調(diào)劑
已經(jīng)有16人回復(fù)
-
287求調(diào)劑
已經(jīng)有9人回復(fù)
-
求調(diào)劑
已經(jīng)有6人回復(fù)
-
308求調(diào)劑
已經(jīng)有3人回復(fù)
-
環(huán)境學(xué)碩288求調(diào)劑
已經(jīng)有6人回復(fù)
ssssllllnnnn 
至尊木蟲 (知名作家)
Translator and Proofreader
- 翻譯EPI: 1690
- 應(yīng)助: 452 (碩士)
- 金幣: 31580.9
- 紅花: 100
- 帖子: 7681
- 在線: 19966.6小時(shí)
- 蟲號(hào): 3328089
- 注冊(cè): 2014-07-17
- 專業(yè): 腫瘤發(fā)生
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
愛與雨下: 金幣+1 2014-09-25 07:28:04
清風(fēng)拂夢(mèng): 金幣+15, ★★★★★最佳答案 2014-09-25 08:08:25
愛與雨下: 金幣+1 2014-09-25 07:28:04
清風(fēng)拂夢(mèng): 金幣+15, ★★★★★最佳答案 2014-09-25 08:08:25
|
認(rèn)識(shí)到多聚羥基喹啉衍生物的重要性，已（報(bào)道）有幾種合成方法，如傳統(tǒng)的加熱法【7】，在乙酸回流法【8】和微波照射法【9】，以及超聲法 【10】。另外也報(bào)道了一些不同的合成多聚羥基喹啉衍生物的其他方法，使用了各種催化劑，如TMSC【[11】，離子液體【12,13】，L-脯 氨酸【14】，聚合物【15】，Yb（OTf）3【16】，Sc（OTf）3【17】，HClO4-SiO2【18】，cerric硝酸銨 【19】，雜多酸【20】，對(duì)甲苯磺酸【21】，HY-沸石【[22】和蒙脫石 K10【23】，其中有些方法與幾個(gè)缺點(diǎn)相關(guān)，如反應(yīng)時(shí)間長(zhǎng)、試劑昂貴、苛刻的反應(yīng)條件、低產(chǎn)品產(chǎn)率，以及使用大量的揮發(fā)性有機(jī)溶劑等。 近年來(lái)，由于環(huán)境和經(jīng)濟(jì)因素非均相催化劑獲得更重要（地位）。由于它們的小尺寸和大的表面積與體積比，納米大小的催化劑可以改善其效率。據(jù)觀察，Nio納米顆粒作為催化劑在有機(jī)轉(zhuǎn)化，如硫醇的化學(xué) - 選擇性的氧化偶合【24】，醛和酮的還原【25-27】，烯烴加氫【28】，和氫的吸附【29】等中的廣泛應(yīng)用引起極大關(guān)注。最近，無(wú)溶劑反應(yīng)領(lǐng)域因其高效、操作簡(jiǎn)單和對(duì)環(huán)境有益的工藝流程而取得有意義的進(jìn)展。多組分反應(yīng)是在現(xiàn)代藥物發(fā)現(xiàn)過(guò)程的有力工具，使能夠快速、自動(dòng)化和高通量合成有機(jī)化合物。從經(jīng)濟(jì)和生態(tài)角度看，用非均相催化劑在無(wú)溶劑條件下進(jìn)行多組分反應(yīng)的可能性可以提高其效率。 |
2樓2014-09-25 06:57:39
清風(fēng)拂夢(mèng)
新蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 268.8
- 帖子: 271
- 在線: 23.9小時(shí)
- 蟲號(hào): 3403337
- 注冊(cè): 2014-09-07
- 性別: MM
- 專業(yè): 高分子合成化學(xué)
3樓2014-09-25 08:45:13
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 清風(fēng)拂夢(mèng) 的主題更新
| 3 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 求調(diào)劑 +7 | Auroracx 2026-03-22 | 7/350 |
|
|---|---|---|---|---|
|
[考研] 296求調(diào)劑 +4 | www_q 2026-03-20 | 4/200 |
|
|
|
[考研] 336求調(diào)劑 +5 | rmc8866 2026-03-21 | 5/250 |
|
|
|
[考研] 一志愿重慶大學(xué)085700資源與環(huán)境總分308求調(diào)劑 +7 | 墨墨漠 2026-03-20 | 7/350 |
|
|
|
[考研] 材料與化工（0856）304求 B區(qū) 調(diào)劑 +3 | 邱gl 2026-03-21 | 3/150 |
|
|
|
[考研] 279分求調(diào)劑 一志愿211 +14 | chaojifeixia 2026-03-19 | 15/750 |
|
|
|
[考研] 求調(diào)劑 +3 | 白QF 2026-03-21 | 3/150 |
|
|
|
[考研] 070300化學(xué)319求調(diào)劑 +7 | 錦鯉0909 2026-03-17 | 7/350 |
|
|
|
[考研] 301求調(diào)劑 +10 | yy要上岸呀 2026-03-17 | 10/500 |
|
|
|
[考研] 303求調(diào)劑 +5 | 睿08 2026-03-17 | 7/350 |
|
|
|
[考研] 083200學(xué)碩321分一志愿暨南大學(xué)求調(diào)劑 +3 | innocenceF 2026-03-17 | 3/150 |
|
|
|
[考研] 304求調(diào)劑 +7 | 司空. 2026-03-18 | 7/350 |
|
|
|
[考研] 290求調(diào)劑 +7 | ^O^乜 2026-03-19 | 7/350 |
|
|
|
[考研] 一志愿西南交通 專碩 材料355 本科雙非 求調(diào)劑 +5 | 西南交通專材355 2026-03-19 | 5/250 |
|
|
|
[考研] 工科材料085601 279求調(diào)劑 +7 | 困于星晨 2026-03-17 | 9/450 |
|
|
|
[考研] 312求調(diào)劑 +8 | 陌宸希 2026-03-16 | 9/450 |
|
|
|
[考研] 0703化學(xué)調(diào)劑 +3 | 妮妮ninicgb 2026-03-17 | 3/150 |
|
|
|
[考研] 有沒(méi)有道鐵/土木的想調(diào)劑南林，給自己招師弟中～ +3 | TqlXswl 2026-03-16 | 7/350 |
|
|
|
[考研] 275求調(diào)劑 +4 | 太陽(yáng)花天天開心 2026-03-16 | 4/200 |
|
|
|
[考研] 中科院材料273求調(diào)劑 +4 | yzydy 2026-03-15 | 4/200 |
|