1) low valent titanium
低价钛
1.
Pinacol coupling reaction induced by low valent titanium has higher chemoselectivity and stereoselectivity,and has increasing attracted organic chemists in recent years.
由低价钛络合物诱发的片呐醇偶联反应,具有良好的化学选择性和立体选择性,近几年来又引起有机化学家们的极大兴趣与重视。
2.
Recent developments on application of low valent titanium to organic synthesis including those of (non)natural products and their analogs, novel substrates as well as the extended/improved McMurry reac- tion are reviewed.
主要综述了近年来低价钛诱导的McMurry反应在有机合成中的应用新进展。
2) Low-valent titanium
低价钛
1.
The reactions of carbonyls with a low-valent titanium reagent prepared by TiCl4with Mg in THF were carried out under ultrasonic action at room temperature for 10 min to1 h and corresponding olefins were obtained in good yields.
本文试图接Luche的解释，选择低价钛作用下谈基化合物的还原偶联反应，以观察超声辐射是否有预期效果。
3) low valent titanium reagent
低价钛试剂
1.
This paper proposed a convenient way for producing disulfides,along which disulfides can be readily prepared in moderate to good yields via the reduction of alkylthiocyanates by the low valent titanium reagent in THF at 0℃.
在四氢呋喃、0℃反应条件下 ,低价钛试剂能容易地还原硫氰酸酯生成相应的二硫化物 ,得到中等至良好的产
2.
Under mild conditions, β ketosulfones were readily reduced by low valent titanium reagent to give corresponding ketones in good yields.
在温和的条件下，低价钛试剂能容易地还原β－酮砜得到较高产率的相应的
4) titanium suboxide
低价氧化钛
1.
In this paper, several methods for preparing titanium suboxide are given and its wide uses in new areas are mentioned.
本文介绍了低价氧化钛的各种制备方法及其在各个新开发领域中的应用。
5) low valent titanium complex
低价钛配合物
1.
Complexes of titanium tetrachloride and tetrahydrofuran in CH 2Cl 2 can be reduced by Zn or Al to the corresponding low valent titanium complexes, which can reduce some aromatic aldehydes to the corresponding pinacols in 33%～98% yields at room temprature within 4～25 min.
超声辐射下 ,于二氯甲烷溶剂中 ,以锌粉或铝粉还原四氯化钛的四氢呋喃配合物可生成相应的低价钛配合物 ,室温下此配合物可使一些芳香醛在 4～ 2 5min内还原偶联为相应的邻二醇 ,收率为 3 3 %～ 98%。
6) titanium subhalide
低价卤化钛<冶>
补充资料：低价区
低价区——
多头市场的初期，此时为中短期投资的最佳买点。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条