乙酰氯

Six derivatives of 4-phenyl-3-phenoloxymethyl-5-mercapto-1,2,4-triazlyole were synthesized from phenoloxyacetyl hydrazide by two-steps reaction under microwave irradiation, then reacted with 2-chloroacetic acid to give six novel derivatives of 2-(3-phenoxymethyl-4-phenyl-[1,2,4]triazole-5-thio)-acetic acid.

在微波辐射条件下，芳氧乙酰肼经两步反应制得4-苯基－3-芳氧甲基－1，2，4-三唑－5-硫酮衍生物，再与氯乙酸反应得到6种尚未见文献报道的2-（3-芳氧甲基－4-苯基－1，2，4-三唑－5-硫基）乙酸衍生物。

Halogen acetylized crosslinked polystyrene resin is used for replacing commonly used methyl chloride polystyrene resin.

用卤乙酰化聚苯乙烯树脂代替了通常所用的氯甲基聚苯乙烯树脂。

Methods The lymphocytes of rats were isolated from the peripheral blood and cultured with sodium arsenite under 37 ℃.The ROS content was detected by DCFH-DA;The content of LPO was detected by fluoresce method.

体外分离大鼠外周血淋巴细胞后，施加处理因素，在37℃条件下恒温培养，用2'7'-二乙酰二氯荧光素染色法检测细胞内的ROS水平，用硫代巴比妥酸荧光法测定细胞内LPO含量。

We make chloroacetylaion to N-terminal of Asp, and then convert this compound to GD dipeptide by aminolysis. Followed the lipase -catalyzed peptide synthesis of RGD in aqueous water-miscible organic cosolvent is studied. We set up a new efficient reaction method to synthesize RGD tripeptide. The problem that peptide containing polar amino acid can not be synthesized readily in organic solvent was solved. We offer a new experimental proof for PPL-catalyzed peptide synthesis and make a more general analysis for the effect of some factors in theory.

采用氯乙酰基保护天冬氨酸，然后进行氨解生成GD二肽，利用猪胰脂肪酶催化合成RGD三肽，着重解决了亲水氨基酸/肽片段底物的溶解性与合成产率低的问题，建立了一种新的有效合成RGD三肽的反应模型，并探索解决了极性较强的氨基酸的酶促肽合成的问题，对脂肪酶催化合成肽的影响因素从理论上作了较全面的分析，为肽片段的缩合反应提供了一种新思路。

We studied the effect of water on the palladium acetate-catalyzed coupling reaction of aryl boronic acid with aryl bromide or acyl chloride in ionic liquid or PEG, and found that water had a remarkable rate accelerating effect on the Suzuki reaction and Suzuki-Type reaction when other reaction conditions were uniform.

研究了水对离子液体或聚乙二醇中Pd2催化的卤代苯或苯甲酰氯与苯硼酸的Suzuki和Suzuki-Type偶联反应收率的影响。

We expounded the N-alkylation, tricholroacetylation and bromination of pyrrole in chapter two.

第二章，论述了吡咯的N-烷基化、三氯乙酰化及溴代反应。

N-Carbobenzoxy-L-homoserinelactone was prepared via N-alkylation reaction of L-methionine and iodoacetamide with benzyl chloroformate as amino protecting agent.

以L-蛋氨酸为原料，氯甲酸苄酯为氨基保护试剂，与碘乙酰胺(I2微量)内酯化反应，合成N-苄氧羰基-L-高丝氨酸内酯。

Most of fluorenyl cardo polyimides exhibited excellent solubility in common organic solvents such as m-cresol,chloroform(CHCl_3), tetrahydrofuran,N-methyl-2-pyrrolidinone,N,N-dimethylacetamideetc and intrinsic viscosity in N,N-dimethylacetamideranged from 0.31-1.00dL/g.

大部分芴基Cardo型聚酰亚胺可以溶解在间甲酚，氯仿(CHCl_3)，四氢呋喃，N—甲基吡咯烷酮，N，N—二甲基乙酰胺等有机溶剂内，在DMAc内的特性粘度范围为0.31～1.00dL/g。

To prepare reference substance for quality control of Inula Britannica L., 1-O-acetylbritannilactone was extracted and separated from chloroform extraction of Inula Britannica L. Chemical structure of the 1-O-acetylbritannilactone product was elucidated by ultraviolet spectrometry, infrared spectroscopy, nuclear magnetic resonance and mass spectrometry, and the results were in agreement with the reference.

从欧亚旋覆花的氯仿提取物中分离制备了1-氧-乙酰大花旋覆花内酯对照品，经紫外光谱、红外光谱、核磁共振和质谱确定结构，其相关数据与文献一致，纯度为99.5%，符合中药化学对照品含量测定用要求。

We ever reported cellulose is in propyl of Xi of ionic liquid 1-- chloric salt of Zun of 3- methylic Mi (the homogeneous phase acetyl in Am ImC L) converts reaction, falling without activator condition, one pace gets the CA of different DS, get acetone but the CDA[12] of dissolve.

我们曾报道了纤维素在离子液体1-烯丙基-3-甲基咪唑氯盐中的均相乙酰化反应，在无催化剂条件下，一步得到不同DS的CA，并得到丙酮可溶的CDA[12]。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。