查询词典 imines

In addition, we have discovered a new reaction, it is that Dy/SiCl_4 can promote imines to give imidazolidines and tetrasubstituted hydrazines.

Dy／SiCl_4体系具有另外一个重要特性，就是我们发现它能够促进亚胺一步生成五取代的咪唑烷和四取代的肼，这是用其它自由基或直接用稀土金属和亚胺反应无法得到的。

For the next step, the fluoroalkylated triazo-compounds (RFCH2N3) reacted with triphenylphosphine affording fluoro phosphorous imines, N-Wittig reagents. The reactions of these reagents with CO2 and CS2 were studied.

氟烷基叠氮化合物和PPh3室温下反应得到中间体磷亚胺化合物，并初步研究了与CO2、CS2的氮杂-Wittig反应。

A base-catalyzed novel olefination methodology based on elimination of p-toluenesulfonamide:Treatment of diethyl cyanomethylphosphonate with catalytic amount of basegave the corresponding phosphoryl-stabilized carbanion, which added to the carbon-nitrogen double bond of N-tosyl imines.

新形成的氮负离子进一步攫取另一分子膦酸酯的活泼亚甲基氢形成加成产物同时再生出膦酰基稳定的碳负离子。加成产物消除对甲苯磺酰胺，高度立体选择性地得到-α-氰基-β-芳基-乙烯基膦酸二乙酯。

We put it to one pot synthesis imines from nitroaromatics for the first time.

我们首次将Ni/SiO_2催化剂用于一锅法合成亚胺的研究。

In addition, some transformation reactions of imines were also examined.

而且在水相中，反应速率有较大程度提高，反应条件更加温和，一些在有机相中不能发生的反应在水相中也能顺利进行。

The Strecker reactions and the addition reactions with diethylzinc of imines in the presence of organophosphine were also studied.

发现在有机膦的参与下，多种亚胺的Strecker反应和普通亚胺与二乙基锌的加成反应都能顺利的进行。

E. The low enantioselectivity may be due to the background reaction of diphenylzinc with imines.

的光学纯度和90%的化学收率，估计低对映选择性可能是苯基锌具有较强的背景反应。

Recent advances in addition,reduction,and asymmetric reactions of imines were reviewed.

亚胺是一类羰基化合物与氨的缩合产物，作者综述了近年国内外亚胺在加成、还原和不对称反应等方面的研究进展

We found the optimal reaction conditions,explored different catalyst system;in the best conditions,we have synthesis a large number of imines with vary complex substituents in the optimal conditions.

我们找到了反应的最佳条件，探讨了不同的催化体系；在最佳条件下，高产率的合成了大量含复杂取代基的亚胺。

This review covers the recent advances on the asymmetric addition reactions of alkylzinc reagents with imines .

综述了烷基锌与亚胺不对称加成反应的最新进展。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。