查询词典 salicylaldehyde

The Perkin method for coumarin synthesis from salicylaldehyde and acetic anhydride has been improved by using calcium acetate as catalyst and polyethylene glycol as activator.

对以水杨醛和乙酸酐为原料合成香豆素的工艺进行了改进。采用乙酸钙为催化剂、PEG为活化剂的工艺路线。

The yield of coumarin could be reached up to 86.6% with lower consumption of acetic anhydride in case the total molar ratio of acetic anhydride to salicylaldehyde=1 9∶1 and the reaction was...

水杨醛与乙酸酐的总摩尔比为 1∶1.9，反应近终点时在( 2 14± 2 )℃保温反应 0 。5h，香豆素收率达 86.6%。

Background and Objective: The basic structure of salicylaldehyde amino acid Schiff base compounds includes a C=N chemical bond.

背景与目的：水杨醛氨基酸Schiff碱基本结构中含C＝N键，当基与金属离子配位后生物活性增强，表现出一定的抗癌、抑菌等活性。

The Perkin method for coumarin synthesis from salicylaldehyde and acetic anhydri de has been improved by using calcium acetate as catalyst and polyethylene glycol as activator.

摘 要 对以水杨醛和乙酸酐为原料合成香豆素的工艺进行了改进。采用乙酸钙为催化剂、PEG为活化剂的工艺路线。

In this thesis, two synthetic routes for the incorporation of sugar moiety into C5(5") or C3(3") of salicylaldehyde part of Salen Mn complex were designed and several corresponding compounds were prepared, as carbohydrate derivatives are widely used in asymmetric catalytic reactions.

鉴于糖类衍生物在不对称催化反应中的广泛应用，设计了两条分别在Salen Mn配合物水杨醛部分C5(5′)、C3(3′)位并入糖基的路线并合成了相应的化合物。

Our research project is focused on the synthesis, structures, spectra characterization and activity research of metal complexes with an amino-Schiff base derived from the salicylaldehyde using as SOD mimics.

本论文的研究主要集中在含有水杨醛氨基乙酸席夫碱的SOD模拟配合物的合成、结构、光谱、热分解动力学，量子化学计算以及SOD活性的测试这几个方面。

Synthesis and characterization of tridentate chiral ligands, a series of Schiff-bases which are synthesized by salicylaldehyde, 2-pyridinecarboxaldehyde and amino alcohols derived from the amino acids without coordination group on side chain.

由侧链不带配位基团的天然氨基酸合成的氨基醇与水杨醛及2-吡啶醛缩合的Schiff-Base等三齿配体的合成与结构分析。

Five bistin Schiff base complexes were synthesized by the reaction of bistin dichloride with Schiff base derived from amino acids and salicylaldehyde in the presence of triethylamine,and were characterized by IR,1HNMR and MS.

二烃基锡配合物的结构类型及其具有较强的抗癌活性引起了人们极大的兴趣。大量的研究表明，有机锡化合物的生物活性主要取决于烃基，但配位基团也有一定的影响[1-3]，尤其在水解、输送等过程中。某些配体对生物活性的发挥还有协同作用。

Salicylaldehyde and its derivatives often produce a formation of Schiff base metal chelate. They are special anti-cancer, anti-inflammatory, sterilization matters. At the same time because of therir structure similar to porphyrin ring, they can set of oxygen and simulated biological effect, So many scientist take interest in this field.

水杨醛及其衍生物与某些伯胺类化合物缩合形成的 Schiff 碱及其金属螯合物，具有特殊的抗癌、抗炎、杀菌、抑霉等活性，同时由于其结构类似于卟啉环，有较好的载氧和模拟生物酶的催化作用，已经引起了各国化学家的广泛兴趣。

The yield of coumarin could be reached up to 86.6% with lower consumption of acetic anhydride in case the total molar ratio of acetic anhydride to salicylaldehyde=1.9∶1 and the reaction was kept 0.5 h at 212～216 ℃ when the reaction was close to the end.

水杨醛与乙酸酐的总摩尔比为1∶1 。9，反应近终点时在(214±2)℃保温反应0.5 h，香豆素收率达86.6%。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。