查询词典 Dinitro

It's found that the aromatic dinitro compounds can be monoreduced to nitroanilines in high selectivity, aromatic nitro compounds and muti-cycle aromatic nitro compounds can be quantitively reduced to the corresponding amine by selenium catalyst with CO/H2O in polar aprotic solvents under atmospheric pressure using medical inorganic bases as co-catalysts.

在实验的基础上提出了对硒催化CO/H_2O还原芳香硝基化合物机理的一些粗浅认识。

Dinitro- benzene, all

二硝基苯，所有

Both hexanitrohexaazatricyclododecanedione and hexanitrohexaazatricyclotetradecanedifuroxan are the typical representatives of fused ring-nitroamine. 4, l0-Dinitro-2, 6, 8, 12-tetraoxadiazatetrocyclo [5.5.0.0^(5.9). 0^(3.11)] dodecane is the typical representative of cage nitroamine.

六硝基六氮杂三环十二烷二酮和六硝基六氮杂三环十四烷并双氧化呋咱是稠环硝胺化合物中的典型代表；4， 10-二硝基－2， 6， 8， 12-四氧杂－4， 10-二氮杂异伍兹烷是笼形硝胺化合物中的典型代表。

The polysaccharose of mycelium of Grifola umbellate (PPS1) and the polysaccha rose of sclerotium of Grifola umbellate (PPS2) both were extracted by hot water leaching way, which were purified dispoing by Sevage way, determined the polysac charose content by 3,5-dinitro-salicylate way, and comparablly analysed infrared spectrum by Fourier transforming infrared spectrophotometer,which suggest that two kinds of polysaccharose were the similar infrared spectrum.

本试验通过人工液体浅层培养方式成功培养出猪苓菌丝体；经热水浸提法分别提取猪苓菌丝体多糖(PPS1)和猪苓菌核多糖(PPS2)；用Sevage法进行纯化处理；用3，5-二硝基水杨酸法测定其糖含量；用傅里叶变换红外分光光度计对两种多糖进行红外光谱比对分析，结果表明两者红外光谱相似。

In this study, new benzo[l,2,3]thiadiazole derivatives were designed according to relationship of structure and efficacy. The 9 novel compounds were synsthesized with following reactions. The chlorine atom in 2-chloro-3,5-dinitro-benzoic acid as beginning raw material was substituted by 2-methylpropane-2-thiol, esterified then with bromoethane, reduced by iron powder and cyclized to obtain ethyl benzo[l,2,3]thiadiazole-7 after diazonation reation.

本论文根据苯并噻二唑诱导剂的构效关系设计了新的苯并噻二唑的结构，并合成了9个未见文献报道的化合物，合成步骤如下：采用2-氯-3，5-二硝基苯甲酸为起始原料，苯环上的氯原子被叔丁基硫醇置换，羧酸由溴乙烷酯化，硝基由铁粉还原，随后经重氮化关环生成苯并[1，2，3]噻二唑-7-羧酸乙酯。

We have synthesized 4,4'-dinitro-3 4''-dimethyl triphenylamine,(1), in 84% yield in an one-step condensation process between 3,4-dimethyl aniline and 4-fluoro-nitrobenzene. After the auto-oxidation of (1) and the subsequent hydrogenation of the nitro-groups, an AB2 type triphenylamine polyimide intermediate bearing two amine groups and one acid-anhydride group each on individual phenyl ring,{AB2 PI Intermediate}, was prepared successfully. The yields of the autoxidation and the hydrogenation steps are 81% and 90% respectively.

中文摘要本研究以3，4-二甲苯胺及4-氟硝基苯为原料，经一步骤缩合反应得到产率为84 %之4，4'-二硝基-3&，4&-二甲基三苯胺(1)，由(1)经自氧化法后再以氢化法还原硝基，成功地制备出带有二胺基与一羧基的三官能基之AB2型三苯胺中间体(AB2型PI中间体)，自氧化反应与氢化法的产率各为81%及90%。

There are three different nucleophilic reagent respectively reaction with m-dinitrobenzene ramification at distint alkaline term:With the nitrobenzene 、 m-nirtobenzenesulfone sodium salt 、 2.4-dinitro chlorobenzene 、 m-dinitrobenzene for bottom thing, benzyl cyanide、 benzyl chloride、 benzyl chloropyridine、is a nucleophilic reagent reaction for under the different term proceeds a series reaction. At the same time ,discuss about the impact factor to nucleophilicity such as the number of attract electron group、 ability of attract electron and the nucleophilic substitution reaction part.

设计了三类不同的亲核试剂分别与活化芳环在不同的碱性条件下发生反应：以苄基氰、苄基氯化吡啶为亲核试剂，以硝基苯、间二硝基苯、间硝基苯磺酸钠、2，4-二硝基苄基氯为底物进行亲核取代反应；并且对亲核试剂的体积效应、溶剂效应对亲核性影响，底物上吸电子基团的数目、吸电子能力对亲电性的影响，以及亲核取代反应的发生部位受哪些因素影响进行探讨。

Synthetic nitro-musks are used in the most wide area recently and industrial crystallization is the most important process to separate solid mixtures such as perfumes. In order to develop new crystallization process to separate synthetic nitro- musks, the phase equilibrium of musk ketone, musk xylene and 1,3-dimethyl-2, 4- dinitro-5-tert- butyl benzene were studied.

合成硝基麝香是用量最大的合成麝香而工业结晶是分离香料等固体产品的重要方法，为了开发麝香体系结晶分离新工艺，本文首先研究了酮麝香、二甲苯麝香和1，3-二甲基-2，4-二硝基-5-叔丁基苯的相平衡关系。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。