查询词典 nitration

A selective nitration of calix[4]arene at the upper rim in one pot process was described by monitoring the time dependence of the distribution of products by high-performance liquid chromatography.

通过高效液相色谱实时监测杯[4]芳烃上沿选择性硝化过程，研究了反应中各种硝化产物的相对浓度随时间的分布情况，得到了五种硝化产物在同一反应体系中的最佳获取时间。

In this dissertation, I will represent my studies on the nitration of Chalcone derivatives, reaction of epoxide ketone, and the aromatization of 3,5-disubstitued 2-isoxazolines with nitric oxide.

本文主要研究了：(1)NO与查尔酮及其衍生物的硝化反应，反应以较高的产率得到了a-硝基化合物；(2)NO对环氧酮的开环反应，反应生成了顺式羟基硝酸酯；(3)3，5-二取代的-2-异恶唑啉在NO作用下可以发生芳环化反应，生成了对应的2-异恶唑化合物。

Was obtained from vanillin by nitration and demethylation.

中间体3 的制备由香兰素经常温硝化、脱甲基制得。

Hydroxy-5, 10-dihydrophenophosphazine 10-oxide (1) reacted with SOCl2, and then with MeONa in MeOH to give a methyl phosphinate (2) which can be converted to a dinitro compound 3 (62%) by nitration and the resulting dinitro compound 3 can further be converted to 2, 8-diamino-10-methoxy-5, 10-dihydrophenophosphazine 10-oxide (4, 71%) by hydrogenation over Pd/C (w = 0.05). And the effect of amount of Pd/C (w = 0.05) on the reduction was also studied.

10－羟基－5，10－二氢磷杂吖嗪－10－氧化物（1）经醯氯化、甲基化得到10－甲氧基－5， 10－二氢磷杂吖嗪－10－氧化物（2），2经硝化得到10－甲氧基－2，8－二硝基－5，10－二氢磷杂吖嗪－10－氧化物（3，62%）。3在Pd／C（w = 0.05）存在下，用氢气还原为2，8二氨基－10－甲氧基－5，10－二氢磷杂吖嗪－10－氧化物（4，71%），考察了Pd／C（w = 0.05）用量对氢化还原反应的影响。

The process of preparing NCAGE included the following steps: alkalization of the treated cellulose; etherification of the alkali cellulose; nitration of the water-soluble cellulose ether; and azidation of nitrocellulose glycidol ether.

利用高压蒸汽闪爆处理后的Novel纤维素为原料，经过碱化、醚化、硝化和叠氮化反应，得到了一种新型高能粘合剂——硝化纤维素叠氮甘油醚，并采用元素分析、DSC、FIT红外光谱和X-射线等对其含氮量、结构和性能进行了分析表征。

Amino-6-nitrobenzodifuroxan was prepared through a three-step reaction from starting material 3, 5-dinitrobenzoic acid:(1)3, 5-dinitroaniline (1) was synthesized from the reaction of DNBA and hydrazoic acid in inert solvent 1, 2-dichioroethane through Schmidt rearrangement with yield of 89.6%;(2) 1 was subjected to nitration to prepare pentanitroaniline (2) with yield of 51.1%;(3) The title compound was prepared from 2 and sodium azide in acetic acid through denitrogenation and then Schmidt rearrangement with yield of 86.8%, m.p.204℃～206℃.

以3，5-二硝基苯甲酸为原料经过3步反应合成了7-氨基6-硝基苯并二氧化吠咱：第1步反应，在二氯乙烷惰性溶剂中，DNBA与叠氮酸反应并发生Schmidt重排反应生成3，5-二硝基苯胺(1)，产率89.6%；第2步反应，1在含100%硫酸的硝硫混酸中硝化生成五硝基苯胺(2)，产率51.1%；第3步反应，2与叠氮酸反应，不经分离直接进行热解脱氮、Schmidt重排反应，得到目标化合物， m.p.204℃~ 206℃，产率86.8%。

Xinquan HuTwo new chiral backbones R-- and S--2-amino-2"-hydroxy-4,4",6,6"-tetra methyl-1,1"-biphenyl were synthesized via nitration, diazotation/iodination, Ulhnann coupling, selective reduction, diazotation/hydrolysis, hydrogenation and resolution from 2,4-dimethyl-aniline in seven steps.

以2，4-二甲基苯胺为起始原料，经过硝化反应、重氮化碘代反应、Ullmann缩合反应、选择性双硝基单还原反应、重氮化水解反应、催化氢化反应和拆分，首次合成了--2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯和--2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯两个对映体。

Racemic backbones 2-amino-2'-hydroxy-6,6'-dimethyl-l,l'-biphenyl la and 2-amino-2'-hydroxy-4,4',6,6'-tetramethyl-l,1'-biphenyl 1b were synthesized from o-methylaniline and 2,4-dimethylaniline via nitration, diazotation/iodination, Ullmann coupling, selective reduction, diazotation/hydrolysis and hydrogenation.

从邻甲苯胺及2，4-二甲基苯胺出发，经过硝化，重氮化-碘代，偶联，单还原，重氮化-水解及还原反应合成了消旋体骨架2-氨基-2'-羟基-6，6'-二甲基-1，1'-联苯1a和2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯1b。

First, 5-nitro-1 and 4-naphthoquinone are prepared through nitration and oxidization of naphthalene, and then through reduction of nitro into amide, diazotisation of the amide and hydro-lytic action of diazo salt, the juglone is made.

萘经过硝化、氧化生成5-硝基-1，4萘醌，然后硝基还原成氨基、氨基重氮化、重氮盐再水解，最终用新方法制得胡桃醌。

Results indicate that the severity of a loss of control for mononitration of toluene by mixed acid can be reduced from medium to low by using semi-batch reactor, the reaction is 1.2 kinetic order in toluene, 1.3 order in nitric acid and 2.5 order in all. The MTSR_max under setting operating conditions are all in the range that can be accepted by the industrial nitration, so the reaction has less hazard potential by using those setting conditions.

分析结果表明：在设定的工艺条件下，反应过程中对甲苯的反应级数是1.2级反应，对硝酸是1.3级反应，采用半间歇反应可以使失控反应的严重度等级从中等降低到低等，在设定操作条件下假定反应失控所引发的MTSR_是在工艺条件允许的范围之内，不具有很大的危险性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。