乙腈

Ee value was achieved when acetophenone was chose as the substrate under the optimal condition.

研究了该催化剂催化的以苯乙酮为底物的不对称硅腈化反应，在最佳反应条件下得到了69%的ee值。

We provide intermediates of Methylphenidate HCl: 2-Phenyl-2-(2-Piperidyl) Acetamide; 2-Phenyl-2-(2-Piperidyl) Acetic Acid; Series of Benzoic Acid、Benzonitrile; Other pharmaceutical intermediates.

提供盐酸利他林中间体：2-苯基-2-(2-哌啶基)乙酰胺；2-苯基-2-(2-哌啶基)乙酸；苯甲酸、苯甲腈系列及其他医药中间体。

We choose Japan's NIPPON ZEON nitrile, B C, chloroprene rubber and Shanghai three love the rich and the United States 3 M's fluoride rubber.

我们选用日本NIPPON ZEON公司的丁腈、乙丙、氯丁橡胶及上海三爱富公司和美国3M公司的氟橡胶。

Applications A fast curing accelerator for natural, synthetic rubber and latex, it can be used as accelerators of butyl rubber, acrylonitrile-butadiene rubber and EPDM rubber, non-toxic, inodorous, stainless and changeless in colors on products, suitable for coated fabric,.

用途 天然胶、合成胶用超促进剂以及乳胶用一般促进剂。特别适用于对压缩变形有要求的丁基胶和耐老化性能优良的丁腈胶，也适用于三元乙丙胶。

Takenaka and colleagues[35] demonstrated that estradiol, which functions as a potent antioxidant in hepatocytes, could protect women against the progression of NAFLD by inhibiting lipogenesis in adipocytes via induction of adiponectin and suppression of TNF-alpha.

Takenaka及其同事证明雌二醇作为肝细胞内一个有效的抗氧化剂，可以通过诱导乙二腈和抑制TNF-α来阻止脂肪细胞内的脂肪形成，并因此保护妇女以避免NAFLD的发展。

Three methods are used to prepare molecular imprinted polymers,which include conventional bulk technique or polymerization with ultraviolet initiated in low temperature and polymerization with silica-gel as sacrificial materials. In the polymerization procedure , Sulfamethazine(SM2)and Sulfisoxazole were used as target template molecules, methacrylic acid and 4-vinylpyridine(4-VP) and acrylamide were selected as functional monomers, ethylene glycol dimethacrylate as crosslinker, azobisisobutyronitrile was used as initator.

主要工作如下：首先，以磺胺异噁唑和磺胺二甲嘧啶为模板，分别以4-乙烯基吡啶，甲基丙烯酸，丙烯酰胺为功能单体，以二甲基丙烯酸乙二醇酯为交联剂，偶氮二异丁腈为引发剂，采用了传统方法(60℃恒温水浴)、牺牲硅胶法及低温紫外光聚合法等三种方法合成了一系列的磺胺类药物印迹聚合物。

Bromoxynil octanoate was synthesized from bromoxynil, octanoic acid and thionyl chloride in the solvent using DMF and N(C 2H 5) 3 as catalysts by one step reaction.

以DMF、三乙胺为催化剂，在溶剂中，用辛酸直接合成了溴苯腈辛酸酯，实现由酸合成酯的一步反应。

The reaction proceeded in xylene at 120 ℃ for 10 h to give bromoxynil octanoate in 91% yield.

以DMF、三乙胺为催化剂，在溶剂中，用辛酸直接合成了溴苯腈辛酸酯，实现由酸合成酯的一步反应。

Analytical results showed that the upper clear liquid of pyrolysis oils was mainly consisted of water-soluble substances,such as phenol,cresol,xylenol,sugars,hydantoins,morpholines,pyranones and pyridine derivatives compounds,etc.,while the lower sediment was mainly insoluble or hardly water-soluble substances,such as the big substituent phenolics(the number of substituent carbon atoms of which is greater than or equal to 2),aryl phosphate esters,fatty acid esters and nitrile compounds,and so on.

研究表明，热解油上层清液主要是一些较易溶于水的物质，如苯酚、甲酚、二甲酚、糖类、乙内酰脲类、吗啉类、吡喃酮类和吡啶类化合物等；而下层沉淀则主要为不溶或难溶于水的物质，如大取代基酚类（取代基碳原子数≥2）、磷酸三芳基酯类、脂肪酸酯类和腈类化合物等。

In the presence of catalytic rhodium acetate, ethyl 2-diazo-3-oxo-per fluoroalkanoates, reacted readily with nitriles to give a series of 5-fluoroalkyl substituted 1, 3oxazoles with high regio-selectivity through a metal carbenoid intermediate. The reactions of carbenoids with noncyclic vinyl ethers or cyclic vinyl ethers afforded dihydrofuroates in good to excellent yields. Interestingly, only vinyl C-H insertion compound was obtained concerning of the reaction of carbenoids with 2, 5dimethylfuran due to the steric hindrance of methyl group

醋酸铑分解2-重氮-3-氧代-全氟羧酸乙酯形成的金属卡宾作为1，3-偶极体，可以与一系列芳基或烷基取代的腈反应，高度区域选择性地生成一系列4-乙氧羰基-5-氟烷基取代的噁唑化合物；也可以与富电子的链状和环状的烯基醚反应，以优良的产率得到一系列氟烷基取代的二氢呋喃类化合物；而与2，5-二甲基呋喃的反应，由于甲基的位阻作用，只得到金属卡宾对呋喃3-位烯基碳氢键插入产物。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。