十二烷基

THE FIRST TOTAL SYNTHESIS OF TAXAMAIRIN B Taxamairin B, representive of rare naturally-occuring rearrang-ed 9(10→20)-abeo-8, 11, 13-triene diterpenoids, has been firstsynthesized by a eleven-step route in an overall yield of 8.19%,starting from commercially available catechol and 1,3-cyclohexan-dione. The improved Friedel-Crafts annulation, thermodynamicallycontrolled-geminal pairing methylation, the selective oxidation ofallyl group and the selective reduction of the less-hindrancecarbon-carbon double bond are the key steps.

二。美丽红豆杉素B的全合成研究 1，美丽红豆杉素B的首次全合成以价廉，易得的邻苯二酚和1，3-环己二酮为原料，经过改良的Friedel-Crafts烷基化反应，热力学控制的α，β-不饱和酮结构的α一位双烷基化，烯丙位的选择性氧化，以及选择性还原位阻较小的碳碳双键等十一步反应，以8.19％的总收率首次完成了美丽红豆杉素B的全合成。

The fuberidazole was prepared by reaction of O-phenylendiamine with furfural at the presence of CTMAB as catalyst.

以邻苯二胺和糠醛为原料，以十六甲基三烷基溴化铵为催化剂合成了麦穗宁。

In this thesis, investigations focused on heteropoly acids-catalyzed C-C and C-N bond formation reactions and the synthesis of xanthenediones and acridinediones under thermal conditions are described.1.12-Phosphotungstic acid has been used as an efficient,eco-friendly,and air- and moisture-stable catalyst to promote the direct dehydrative substitution of the hydroxy group of benzylic and allylic alcohols with variousβ-dicarbonyl compounds.

本篇论文主要描述了杂多酸催化下的C-C和C-N键的生成，以及无溶剂直接加热下合成十氢氧杂蒽二酮和9-芳基十氢吖啶二酮。主要内容如下：1。在磷钨酸催化下，1，3-二羰基化合物与醇能够顺利偶合，脱除一分子的水，生成烷基化的1，3-二羰基化合物。反应在甲苯中进行时，二芳基甲醇能与各类1，3-二羰基化合物反应，成率很高；但对于1-苯乙醇，只能得到很低的产率。

They were acetic acid, benzaldehyde, n caproic acid, methyl pentadecanoic methyl ester, glycerin, benzoic acid,,9 octadecadienoic methyl ester, squalane, stearic acid and oleic eicosyl ester.

它们是乙酸、苯甲醛、正葵酸、-甲基十五烷酸甲酯、丙三醇、苯甲酸、，9-十八碳二烯酸甲酯、角鲨烷、硬脂酸和二十烷基油酸酯。

Two kinds of high alcohol acrylates were prepared by octadecyl alcohol and hexadecyl branched alcohol,respectively.The polymers of depressants were prepared by maleic anhydride-styrene-higher alcohol acrylates.By using these depressants,the pour points of the Liaohe crude oils were lowered form 30℃ to 20℃.

分别采用碳十八直链醇、碳十六支链醇与丙烯酸合成烷基酯，将烷基酯再与顺丁烯二酸酐、苯乙烯聚合制备的三元共聚物，对辽河油田的高凝原油的降凝效果进行了评价，实验发现这两种聚合物对凝固点为30℃原油都具有较好的效果，降幅可达10℃左右，但对凝固点为41℃的原油较差分别为3℃和6℃。

And the morphologies of lead tungstate crystal were different when different surfactants of polygycol 200 and cetyltrimethyl ammonium bromide were added in the experiments.

以钨酸钠和醋酸铅为原料，分别加以表面活性剂聚乙二醇200和十六烷基三甲苯溴化铵，用沉淀法合成出钨酸铅纳米晶和菱形微晶。

Little literature on the aspect of surfactants containing boron with long-carbon chain alkyls had been found.Using diethanolamine, boric acid, hexadecanol as starting materials, after a series of reaction such as vapour phase process bromizating, esterifying, alkylating, a new type of surfactants with boron RNB had been obtained. The structures of the compounds had been identified by elemental analysis, IR and HNMR.

本论文采用二乙醇胺、硼酸、十六醇等为主要原料，经气相法溴化、酯化、烷基化等一系列反应合成了一种新型含硼表面活性剂RNB，并通过元素分析、红外、核磁对其结构进行了确认。

Surfactant p-octyl polyethylene glycol phenyl ether (Triton X-100) or cetyltrimethylammonium bromide was mixed with n-hexane, n-hexanol, and water for preparing reverse microemulsion.

分别以聚乙二醇辛基苯基醚(Triton X-100)或十六烷基三甲基溴化铵为表面活性剂，与正己烷、正己醇和水构成反相微乳液。

Mesoporous tin oxide was synthesized by using cetyltrimethyl ammonium bromide or CTAB and Tween-20 as the template or hydrothermal process. Hollow tin dioxide micospheres were synthesized by using resorcinol-formaldehyde gel as the template or hydrothermal process. Thermogravimetric analysis, X-ray diffraction and electron microscopy have been used to characterize the materials.

本文分别采用十六烷基三甲基溴化铵模板法、CTAB和吐温20复合模板法及水热法来合成介孔氧化锡；用间苯二酚和甲醛凝胶模板法及水热法合成空心球氧化锡，并用热分析、X射线衍射、电镜等对以上材料作了形貌及结构表征。

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