合成

They are classified into three basic structural types according to the arrangement of the C-9/C-10 skeleton to form the Corynanthe, Aspidosperma and Iboga types, typified by ajmalicine, vindoline and catharanthine, respectively.

单萜吲哚生物碱因其骨架和官能团的丰富变化，加上它们的生物活性，多年来一直哟引着一代又一代的化学家对其进行结构和合成研究，它们的共同生物合成前体strictosidine是由色胺和单萜苷secologanin缩合形成的。

Spinel lithium manganese oxide has become the most important material of li-ion second battery for its inexpensive price,excellent character and avirulence,and also gets some achievements in the recent years.

重点介绍了尖晶石相锂锰氧化物的主要合成方法，如固相反应法、软化学法等，并对它们的原理、优势和缺点进行了简单的介绍和讨论，对锰酸锂合成工艺的未来发展和走向作了简单的展望。

The two products we prepared are avirulent and biodegradable, and are coincident with the request of """"green chemistry"""". Thus they represent the orientation of scale inhibitor, and have a bright application future.

北京化工大学硕士研究生论文所合成的两种产品具有无毒无害、可生物降解的特点，合成生产工艺实现绿色化，因此代表了未来阻垢剂的发展方向，具有广阔的应用前景。

Using castor oil as material, this paper reported a two-step reaction combined with saponification and oxidation for azelaic acid synthesis.

本文以蓖麻油为原料，经过皂化、氧化两步反应合成了壬二酸，该合成工艺使反应条件变得比较温和，后处理大为简化，产品纯度明显提高，总收率提高到80％。

The Knoevenagel condensation reactions between aromatic and α,β-unsaturated aromatic aldehydes with barbituric acid can effectively be performed in ionic liquid without additional acid or base catalyst, it is a simple efficient method for the synthesis of benzylidene barbituric acids, which have been widely used in pharmaceutical chemistry as well as in organic synthesis.

芳醛、α，β-不饱和芳醛和巴比妥酸间的Knoevenagel缩合反应能在离子液体中没有酸碱催化剂的条件下顺利进行，是合成在药物化学和有机合成中有广泛用途的苯亚甲基巴比妥酸类化合物的简单有效的方法。

Crystal fo uns of belite and helpful for improving the initial hydration activity. The results also indicate that the hydration degrees and the paste compressive strengthes of belite in various hydrat...

提高合成温度，有利于α、α＇型贝利特的稳定，并提高贝利特的初期水化活性；随着合成温度的提高，各龄期水化浆体中贝利特水化程度增大，浆体强度提高。

We had to give uP it. We began to synthesize another i ntermedi at6,benzal dehyde.

因此，我们采用了合成另一中间体苯甲醛来替代乙酰丙酮的合成。

This thesis includes five parts as follows.1. The backgrounds and some relative concepts of this work are briefly introduced. The photochemistry of benzamides and compounds with thiourea functional group is also concisely reviewed.2. Total of fourteen benzamides with different substituted groups have been synthesized and structurally characterized. Better photoreaction time for that kind of compounds at given concentrations is confirmed by tracking its'UV spectrum and GC chromatogram. A representative dibenzophenone photoproduct has been determined by X-ray crystallography. The mechanisms of photoreaction of benzamide have been proposed.3. Total of seven N-chloro(phenylmethylenebenzenamines with different substituted groups and sixty-one thiourea derivatives have been synthesized and structurally characterized.

论文的主要内容如下：1、简要介绍本论文工作的研究背景，并对苯甲酰胺和具有硫脲官能团类化合物的光化学研究进展进行简要的总结。2、合成与表征了14个具有不同取代基的苯甲酰胺类化合物，利用紫外光谱和气相色谱确定了此类化合物较佳光照时间，测定了一个具有代表性光解产物的单晶结构，提出了苯甲酰胺类化合物的光反应机理。3、合成与表征了7个带有不同取代基的氯代苯甲酰亚胺中间体及61个硫脲衍生物，测定了两个具有代表性化合物的单晶结构。

A novel liquid crystalline compound named p-phenylenediamine di 4-[2- benzamide] was synthesized from allyl 2-hydroxyethylether, ethyl 4-hydroxybenzoate and p-phenylenediamine.

以乙二醇单烯丙基醚、对羟基苯甲酸乙酯、对苯二胺为原料合成了末端为不饱和双键的芳香聚酰胺溶致型液晶化合物——二对烯丙氧基乙氧基苯甲酰对苯二胺，最佳合成的摩尔比为∶羧酸∶对苯二胺∶吡啶=2。

The ionic liquid [C_(12H_(25)_2-bim]Br was used as catalyst in the reaction of synthesizing the derivatives of benzil from aromatic aldehydes, which showed better catalytic effect, mild reaction conditions and higher yield.

利用合成的离子液体[C_(12H_(25)_2-bim]Br做催化剂，催化由芳醛合成偶酰的反应，催化效果较好，反应条件温和，产率较高。

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