合成

The experimental result showed that three byproducts was formed and the optimal condition was as follows: the molar ratio of ethylene glycol, hydrogen bromide, and acetic acid was 1:1:1.3, when ethylene glycol was 1 mol, refluxed 5 h under the action of 100 mL toluene.

结果表明：较适宜的合成条件为乙二醇1 mol， n：n：n=1：1：1.3，在带水剂甲苯(100 mL)的作用下，回流反应5 h，约4 h后分两次追加0.12×2 mol醋酸酐，合成效果最好，产率可达到95%，反应副产2-溴乙醇及少量的1， 2-二溴乙烷、乙二醇二乙酸酯和二乙二醇二乙酸酯。

In this paper, initiator is dissolved in 1-bromopropane which is solvent. Then the propene and hydrogen bromide that can be dissolved in 1-bromopropane are inlet in l-bromopropane when initiator is decomposing. The reaction occurs in fluid phase and high-purity 1-bromopropane is synthesized by one step method. In this paper, the material HBr is synthesized with NaBr and sulfuric acid at the presence of hydrobromic acid.

本论文以1-溴丙烷为溶剂，将引发剂溶于其中，加热到引发剂开始分解时再通入丙烯和HBr，使二者溶解于1-溴丙烷中，在液相中进行反应，实现丙烯"一步法"合成高纯1-溴丙烷利用NaBr与硫酸在氢溴酸存在下反应制备HBr气体，以作为合成1-溴丙烷的原料。

We successfully improved the methods of departing O-methyl using boron tribromide, of isolating hydrogen bromide byα-chloro-ethyl chloroformate, and of related in synthesis of natrexone, new medicine, using boron tribromide. This resulted in generation of hydrogen cyanide becoming impossible.

改进了以氯甲酸-α-氯乙酯脱代替溴化氰以及改进的三溴化硼法作为新药纳曲酮合成中相应的方法，去除了合成过程中产生氰化氢气体的可能性。

The ordered mesoporous material MCM-41 was synthesized by a hydrothermal method using fumed silica,sodium hydroxide/tetraethyl ammonium hydroxide/hydrogen chlorideand cetyl trimethl ammonium bromide.

用X射线衍射、氮气吸附-脱附等手段对比分析了合成的3种MCM-41介孔材料的物相、比表面积、孔径、孔体积等，发现酸性介质中合成的介孔材料的孔径最大。

An alternative way of the synthesis of methanol from syngas is low-temperature methanol synthesis via methyl formate in liquid phase, namely, carbonylation of methanol in the first step, and hydrogenolysis of methyl formate in the second step.

低温液相甲醇合成是指在（80-160℃）范围内，甲醇首先与合成气中的CO发生羰基化反应生成甲酸甲酯，甲酸甲酯再氢解生成甲醇的两个反应在一个反应器内串联进行的方法。

The physical and chemical properties of the as-prepared chalcogenides and the reaction mechanisms of hydrothermal process are also studied.

同时，对所合成的硫属化合物的物理及化学性质作了研究，并探讨了水热合成过程的反应机理等。

OBJECTIVE Acetaldoxime was prepared by using acetaldehyde and hydroxylamine sulfate as main materials then methylthio acetaldoxime was synthesized by using the former products as main material.

目的本文研究了以乙醛和硫酸羟胺为主要原料合成乙醛肟，并以乙醛肟为原料合成甲硫基乙醛肟的工艺。

The chapter 1 introduces the background of imidazole, thiazole, tetrazole derivatives and their glycosides, and organic solid phase research.

论文第一章介绍了咪唑环、噻唑环、四氮唑环等杂环的合成，总结了糖苷的合成方法，对杂环的固相合成化学进行了简单介绍。

2 New carbonyl functionalized imide derivatives of maleimide were synthesized by the direct reaction of amino acids with maleic anhydride.

用氨基酸与苹果酸酐直接反应，合成了两个含羧基官能团的苹果酰亚胺，为氨基酸氮端的保护以及含羧基官能团的酰亚胺类化合物的合成提供了一种直接、简便的新方法。

Ni compounds are excellent catalysts for the reduction of nitroaromatics and SiO_2 is a commonly-utilized catalyst for imine formation.

镍类催化剂是硝基还原的优秀催化剂，SiO_2是亚胺合成的常用促进剂，因而Ni/SiO_2很有可能是从芳香族硝基化合物和醛一锅合成亚胺的优良多功能催化剂。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失