中间体

Was synthesized from cyanoacetic acid and diethylamine via DCC coupling under mild conditions.

中间体5 的制备由氰基乙酸在二环己基碳二亚胺作用下经酰胺化一步制得，条件温和，收率较高，避免使用剧毒的氰化钠。

In the second approach, terephthalaldehyde was also used as starting material, which reacted with cyanoacetic acid in pyridine to afford tetra-nitrile compound.

在第二种合成路线中，我们仍然以对苯二甲醛为起始原料，对苯二甲醛与氰基乙酸反应得到四氰基化合物8，再经过官能团转换、还原、亲核取代、分子内Friedel-Crafts反应得到中间体H〓TTPR。

To prepare O-dihydroxybenzene with cyclohexene, trans-1.2- cyclohexanediol is a very important organic intermediate.

1，2-环己二醇是制备邻苯二酚的一个重要的有机中间体。

At present, since fluorobenzene liquid crystal and cyclohexyl crystal are very popular liquid crystals. some research have done on the synthesis of the intermediate, fluorophenol and alkylcyclohexylbenzene compounds in this thesis.

本论文的主要内容分为两部分：第一部分，针对目前液晶材料研究的热点：含氟液晶和环己烷类液晶，就其液晶材料中间体氟代苯酚和烷基环己基苯类化合物的合成进行研究。

The types and kinds of medical intermediate compounds thiaphenol series, pyridine series, cyclopentanone derivant etc.

医药中间体（噻酚系列、吡啶系列、环戊酮衍生物等）品种多样，产品质量保证，深受广大客户好评。

Dihydro-5H-cyclopentanopyridine, a key intermediate of Cefpirome, was synthesized from cyclopentanone and propargylamine under autoclave prompted by copper chloride.

以环戊酮和丙炔胺为原料，在高压釜中用氯化亚铜催化合成头孢匹罗关键中间体6，7-二氢-5H-环戊烷并吡啶。

The related reaction conditions and factors such as catalysis of some catalysts etc were discussed. In the procedures, 2-pentylidene cyclopentanone intermediate, which could be isomerizated into a 2-pentyl cyclopentenone under acidic conditions, was effectively prepared in the presence of a phase transfer promotor.

讨论了正戊醛和环戊酮在碱性条件下缩合生成2-亚戊基环戊酮的反应温度、碱浓度、相转移催化剂等因素对反应的影响。2-亚戊基环戊酮中间体化合物能在酸催化剂作用下，异构成2-戊基环戊烯酮，其中酸浓度和溶剂等参数对反应影响明显。

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。

This invention relates to the manufacture of phenyl and phenyl ethyl malonic esters and more particularly to the manufacture of dialkyl phenylmalonates and compounds are useful as intermediates in the manufacture of medicinals.

本发明和苯基苯乙基丙二酸酯的生产有关，尤其是和二烷基苯基丙二酸酯的生产有关，它们在生产药品的过程作为中间体非常有用。

In a similar way, using N,N\'-dibenzyl tartamide as auxiliary,-(2-methyl)allyl-2-chloro-phenyl-methyl azide, a vital intermediate of Repaglinide, can be prepared via asymmetric allylation of o-chlorobenzaldehyde in

产物经氧化和碘加成内酯化反应得到阿伐他汀中间体(3R，5S)-3-羟基-5-碘甲基戊内酯(10)；将N-苄基酒石酸二酰胺用于邻氯苯甲醛的不对称烯丙基化反应以较高光学收率得-甲基烯丙基-2-氯苯基-甲基醇

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。