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本帖產(chǎn)生 1 個(gè) 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看

185012831

銀蟲 (小有名氣)

應(yīng)助: 0 (幼兒園)
金幣: 234.4
散金: 820
紅花: 3
帖子: 182
在線: 144.5小時(shí)
蟲號: 1239848
注冊: 2011-03-21
性別: GG
專業(yè): 無機(jī)納米化學(xué)

[求助] 有機(jī)化學(xué)機(jī)理外文翻譯求助

In contrast we have found that a wide variety of allylic trichloroacetamidates,
which are easily prepared in nearly quantitative yield from the corresponding alcohol and trichlorIn contrast we have found that a wide variety of allylic trichloroacetamidates,which are easily prepared in nearly quantitative yield from the corresponding alcohol and trichloroacetonitrile, readily undergo thermal rearrangement within a few hours in refluxing m-xylene to afford the corresponding trichloroacetamides in isolated yields in excess of 80 In no case has the trichloroacetamide with an unrearranged carbon skeleton
been detected. This transformation is formulated
as a simple electrocyclic reaction on the basis of its
stereo- and regiospecificity which is similar to that observed
in related [3,3]-sigmatropic processes. 2,8 For
example, the trichloroacetimidate of 1-hepten-3-01
affords 2-heptenyltrichloroacetamide with a trans to cis
ratio of at least 98:2.acetonitrile,~ readily undergo thermal rearrangement
within a few hours in refluxing m-xylene to
afford the corresponding trichloroacetamides in isolated
yields in excess of 80 In no case has the
trichloroacetamide with an unrearranged carbon skeleton
been detected. This transformation is formulated
as a simple electrocyclic reaction on the basis of its
stereo- and regiospecificity which is similar to that observed
in related [3,3]-sigmatropic processes. 2,8 For
example, the trichloroacetimidate of 1-hepten-3-01
affords 2-heptenyltrichloroacetamide with a trans to cis
ratio of at least 98:2.

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1樓 2011-12-03 12:51:40

已閱回復(fù)此樓關(guān)注TA 給TA發(fā)消息送TA紅花 TA的回帖

13599388598

金蟲 (正式寫手)

翻譯EPI: 17
應(yīng)助: 1 (幼兒園)
金幣: 911.1
散金: 300
紅花: 2
帖子: 364
在線: 52.1小時(shí)
蟲號: 1472756
注冊: 2011-11-02
專業(yè): 水產(chǎn)生物營養(yǎng)與飼料學(xué)

【答案】應(yīng)助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
185012831(金幣+40, 翻譯EPI+1): 翻譯的很好，不過有些估計(jì)是您沒學(xué)有機(jī)化學(xué)的原因，不是很通順啊。。 2011-12-03 14:48:00
愛與雨下(金幣+1): 2011-12-04 09:59:53
sltmac(金幣+10): 2011-12-14 12:38:48

樓主也整理下再求助呀
有很多重復(fù)內(nèi)容呀
In contrast we have found that a wide variety of allylic trichloroacetamidates,which are easily prepared in nearly quantitative yield from the corresponding alcohol and trichloroacetonitrile, readily undergo thermal rearrangement within a few hours in refluxing m-xylene to afford the corresponding trichloroacetamides in isolated yields in excess of 80。In no case has the trichloroacetamide with an unrearranged carbon skeleton been detected. This transformation is formulated as a simple electrocyclic reaction on the basis of its stereo- and regiospecificity which is similar to that observed
in related [3,3]-sigmatropic processes.
For example, the trichloroacetimidate of 1-hepten-3-01 affords 2-heptenyltrichloroacetamide with a trans to cis ratio of at least 98:2.acetonitrile,~ readily undergo thermal rearrangement within a few hours in refluxing m-xylene to afford the corresponding trichloroacetamides in isolated yields in excess of 80。
對比我們發(fā)現(xiàn)的多種烯丙基trichloroacetamidate（三氯乙酰胺），他能從相應(yīng)的酒精和三氯乙氰中容易制備得到，在回流的間二甲苯中幾個(gè)小時(shí)內(nèi)容易受到熱重組影響，從而使得三氯乙酰胺的產(chǎn)量超過80%。經(jīng)過檢測三氯乙酰胺的碳骨架無論如何都不會(huì)產(chǎn)生重排。這種轉(zhuǎn)變是一種基于其實(shí)體和區(qū)域特異性的簡單的電環(huán)化反應(yīng)，這與已觀察到的單鍵轉(zhuǎn)移現(xiàn)象相似。

例如，1-hepten-3-1的三氯乙酰胺為2-heptenyltrichloroacetamide
（庚烯基三氯乙酰胺）提供反順比至少98:2的乙腈,使其在回流的間二甲苯中幾個(gè)小時(shí)內(nèi)容易受到熱重組影響，從而使得三氯乙酰胺的產(chǎn)量超過80%

贊一下(2人)

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2樓2011-12-03 13:32:44