定制各类格氏试剂

问题:帮忙翻译一段话
类型:求助 (悬赏分:3分)
提问:quick208
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版块:有机化学问题(jimuwei,fpcwin1211,netpanda,yjgzfl,Ftian,)
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时间:2008-06-27 08:59:20  编辑    加入/取消收藏    订制/取消短消息    举报该贴    

Magnesium is a powerful reducing agent: it is used in the
preparation of Grignard reagents and for reduction of
various alkyl and aryl halides in protic solvents; it also readily
reduces conjugated double bonds of esters, nit rile,
amide, and diary1 disubstituted ethylenes in methanol,
as well as a,B-acetylenic esters and triple bonds conjugated to
two aromatic rings. Under the same conditions, unactivated
double and triple bonds are reduced in the presence of Pd-C,"
while desulfonation was also effected with magnesium in
methanol.In aprotic solvents magnesium effects pinacol
reductive coupling of aldehydes and ketones. To our
knowledge, however, it has never been used for reductive
amination of carbonyl compounds, nor for reduction of pre-
formed imines.
回复人:高粱米大碴子, () 时间:2008-06-28 06:30:04   编辑 1楼
Magnesium is a powerful reducing agent:
金属镁是一个很强的还原剂:

it is used in the preparation of Grignard reagents and for reduction of
various alkyl and aryl halides in protic solvents;
它用于制备格式剂以及在质子性溶液中还原不同的烷基和芳香基卤代物

it also readily reduces conjugated double bonds of esters, nitrile,
amide, and diary1 disubstituted ethylenes in methanol,
as well as a,B-acetylenic esters and triple bonds conjugated to
two aromatic rings.

在甲醇中,它很容易的还原不饱和酯,氰,酰氨 和二芳香取代乙烯的共轭双键, 以及酯的beta-乙炔基和与两个芳香取代基共轭三键。

Under the same conditions, unactivated double and triple bonds are reduced in the presence of Pd-C,"
while desulfonation was also effected with magnesium in methanol.
在相同条件下不反应的双键和三键是采用Pd-C催化还原的. 同时镁在甲醇中对脱磺反应也有一定的作用!

In aprotic solvents magnesium effects pinacol reductive coupling of aldehydes and ketones.
在非质子性溶剂, 镁对频纳醇与醛和酮的还原耦合反应也有一定效果。

To our knowledge, however, it has never been used for reductive amination of carbonyl compounds, nor for reduction of pre-formed imines.
可是据我们所知,它还从来没有被用于羰基的还原氨化和用于一个已制亚胺的还原。

[该帖子已被高粱米大碴子在2008-06-28 08:11:50编辑过]


回复人:quick208, (以父之名) 时间:2008-06-28 10:44:37   编辑 2楼
已经打分了!


回复人:afc,★★ (氟化学产品) 时间:2008-06-28 10:30:21   编辑 3楼



回复人:jun21987,▲▲▲▲▲ (自己的人生想加点醋和酒精) 时间:2008-06-27 09:03:26   编辑 4楼
镁是一种强大的还原剂:这是用在该
制备格氏试剂和减少
各种烷基和芳基卤化物在protic溶剂;它也容易
降低了共轭双键的酯, nit rile ,
酰胺,并diary1取代ethylenes在甲醇,
以及甲,乙- acetylenic酯和三重债券,以共轭
两个芳香环。在相同条件下, unactivated
双重和三重债券减少,在场的钯- C的, “
而desulfonation也影响与镁在
methanol.in质子溶剂中镁的影响,频哪醇
还原偶联的醛酮。我们
知识,不过,它从未被用于还原
胺的羰基化合物,也为减少预
形成亚胺。


回复人:quick208, (以父之名) 时间:2008-06-27 09:05:56   编辑 5楼
不要用软件翻译的。一点不通顺


回复人:quick208, (以父之名) 时间:2008-06-27 09:06:16   编辑 6楼
一点不通顺,不要用软件翻译啊


回复人:jun21987,▲▲▲▲▲ (自己的人生想加点醋和酒精) 时间:2008-06-27 10:22:09   编辑 7楼
镁是一种强有力的脱氧剂: 用于格利雅试剂的制备和的减少的在质子溶剂的中各种烷基和芳香族羟基的卤化物;它夜容易降低含双键酯的共轭性
,被共轭的双键搅浑,
在甲醇中酰胺和二芳基双取代了乙烯 。并且和甲乙炔相象的酯类和三键的共轭了
两个芳香环。 在同样条件下,未激活的
双键和三键在Pd-C面前减少, “
脱磺酸盐也影响了镁在甲醇中的溶解. 在质子性的溶剂镁影响,频哪醇
醋醛和酮减少联结。 对我们
而言,然而,它为与减少有关的从未使用羰基化合物的氨化,亦不预备的的减少的形成亚胺。


得分人:高粱米大碴子 :2,


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