中间体

Since the reaction conditions are moiled,and the productswere isolated easily,so it is a easy and new method for the preparation of complexescontaining titanium-tin bond.

反应的ESR研究发现，反应过程中存在三价钛中间体，包括〓X和〓，认为反应是经由自由基过程进行的。

Furthermore, the degree of optical purity of pesticides is osculating with the degree of chiral intermediate.

手性药物的光学纯度高低直接和生产该药物的手性中间体的光学纯度密切相关。

Huaren has the expertise in Chirality Technology,especially in Asymmetric Synthesis as well as Chiral Separation.Huaren stands for high reputes in the circles for its high quality,credit and good service.Our key words is

公司主要从事医药原料药的生产，致力于高新技术产品的研究开发，并在手性药物中间体和多肽类氨基酸保护剂上取得了长足进步。

The synthesis of alkylcyclohexylbenzoic acid: take the synthesis of ethylcyclohexylbenzoic acid as a typical example. With the AlCl3 as the catalyst, cis+trans acetylcyclohexylbenzene is synthesized from the reaction of acetyl chloride, cyclohexene and benzene.

烷基环己基苯甲酸的合成研究：主要研究了乙基环己基苯甲酸的合成，以乙酰氯、环己烯、苯为原料，三氯化铝为催化剂，合成乙酰基环己基苯，用水合肼、氢氧化钾、一缩二乙二醇经过高温加热还原羰基(Wolff-黄鸣龙还原)，将所得到的乙基环己基苯用乙酰氯进行傅克酰基化得到乙基环己基苯乙酮，所得中间体经过处理之后直接得到反式产物，将反式异构体的乙酰基氧化得到反式烷基环己基苯甲酸。

Citric acid anhydride was synthesized by citric acid and acetic anhydride with acetic acid as solvent.

柠檬酸酐是由柠檬酸两个羧基间脱水形成的，具有吸水性和酰化能力，是合成农药、医药、食品、饮料、清洁剂、化妆品和树脂的一种重要的中间体[1-2]。

In particular, an investigation was carried out into the different temperatures used on the degradation of sugars and amino acid and the extent of accumulation of browning intermediates, such as Amadori product, organic acid, brown pigment formation and pH changes.

研究了在不同反应温度(80、100、120℃)和不同反应时间下，体系中糖和氨基酸的降解程度，反应中间体：阿利德诺和有机酸的累积程度，类黑素的形成及pH变化程度。

I mainly have the following products: a calcium oxide, calcium phosphate, DCP, polydextrose, thorn Indus gum, locust bean gum, plastic-looking son, flaxseed gum, guar gum, xanthan gum, Carrageenan, konjac gum, CMC, casein, citric acid, sorbitol, VC sodium, salt and sodium phosphate, and other pharmaceutical intermediates!

我公司主要经营产品：过氧化钙、磷酸三钙、磷酸氢钙、聚葡萄糖、刺梧桐胶、刺槐豆胶、罗望子胶、亚麻籽胶、瓜尔豆胶、黄原胶、卡拉胶、魔芋胶、CMC、干酪素、柠檬酸、山梨醇、VC钠，磷酸钠盐及医药中间体等！

Is a professional engaged in production and management of neutral dyes, acid dyes and dye intermediates businesses.

青岛科瑞达精细化工有限公司是一家专业从事生产和经营中性染料、酸性染料及其染料中间体产品的企业。

Main products include phosphoric acid,phosphate,food additive,medicine intermediates,inorganic products,organic products etc.

主要经营的产品有：磷酸及磷酸盐、食品添加剂、医药中间体、无机产品，有机产品等领域。

Bromo-2-sulfolene (2) reacted with substituted benzoic acid salt s 3a～3c or alizarin yellow (3d) to give four novel allylic substitution products 4a～4d by esterification reaction, respectively.

以3，4-二溴环戊砜(1)为原料，在无水吡啶作用下发生消除反应，得到反应中间体4-溴-2-环戊烯砜(2)，再分别与一系列取代苯甲酸盐3a～3c以及茜素黄GG(3d)发生酯化反应，合成出4种新环戊烯砜衍生物4a～4d，并用IR，1HNMR，MS，元素分析等表征了它们的结构。

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。