酯化了的

Paraacetaminophenyl-β-hydroxyethylsulfone can be used as raw material to produce the target product 2-sulfonic-4-(β-sulphatoethyl-sulphone) phenylamine through sulfonationating and hydrolytic reactions.

本文研究了以对乙酰氨基苯基-β-羟乙基砜为原料，经磺化和水解反应，制得产品2-磺酸-4-苯胺的合成工艺，以及2-磺酸-4-乙基砜基硫酸酯苯胺钠盐后处理的最佳操作工艺。

To further testify the high efficiency of these new reagents in the synthesis of sterically hindered peptides, we successfully synthesized the extensively -N-methylated peptide moiety of the antineoplastic and lipophilic depsipeptide Dolastatin 15 using reagent BEP and FEP. We also synthesized the highly hindered tetrapeptide segment of Cyclosporin A using reagent BEMT and BEP, respectively.

为进一步检验这类吡啶正离子型缩合剂在有空间位阻的多肽合成中的性能，我们以BEP和FEP为缩合剂，成功地合成了具有抗肿瘤活性的亲脂性酯肽Dolastatin 15分子中高N-烷基化的肽链部分；分别以BEMT和BEP为缩合剂合成了生物活性肽Cyclosporin A中空间位阻最大的四肽片断。

Hydroesterification of tert-butyl alcohol with ethanol catalyzed by transition metal triphenylphosphine complexes was first investigated in room temperature ionic liquids.

反应温度为100～140 ℃，CO初始压力为2～6 MPa条件下，研究了室温离子液体与过渡金属三苯基膦配合物构成的催化反应体系中，叔丁醇与乙醇的氢酯基化反应。

The effects of vacuolization on the differentiation of vascular endothelial cells were analyzed from a chemical biochemistry genetics perspective using the blastodisc cells differentiation model induced by FGF with the γ-butyrolactones derivative.

从化学遗传学的角度，利用γ-丁内酯衍生物研究了成纤维细胞生长因子（fibroblast growth factor， FGF）诱导鸡胚盘细胞向血管内皮细胞分化过程中，空泡化对血管内皮细胞分化的影响。

In this paper, the latest progress of the nitration of deactivated aromatic compounds is reviewed in the point of view of nitrating agents, including nitrate-sulfuric acid, nitrate ester, nitric acid and nitrogen oxides.

本文从硝化试剂角度综述了近年来钝化芳环的硝化反应的进展，包括硝酸盐/硫酸、硝酸酯、硝酸、氮氧化物等硝化方法。

Challendor Chemical Co, focusing on manufacturing and trading raw natural oils as well as downstream products. In lubricant industry, we specialize in producing animal oil originated products, such as sulfurized synthetic esters, sulfurized lard, sulfonated lard, blown lard, etc.

上海骋德贸易有限公司专注油脂化学品的研发、代工生产与贸易，整合国内油脂化工企业资源，结合多年行业经验与应用技术探索，形成了以天然油脂、合成酯为源头，以硫化、磺化、硫酸化为技术专长，以润滑、乳化、复配为研究重点的企业技术特色，服务业内用户。

Chiral ligands mentioned above and their complexes with acetate copper were used as enantio-selective catalysts in asymmetric cyclopropanation reactions of diazoacetate and 1,1-diphenyl ethylene. Investigations indicate that all of them reveal certain optical-selective capability, but chiral C2-symmetric 2,6-bispyridine ligands show better catalytic capability than chiral asymmetric schifF-base ligands.

选择了2个手性2，6-吡啶双噁唑啉配体和6个手性不对称席夫碱配体与醋酸铜形成的配合物作为催化剂，对重氮乙酸乙酯与1，1-二苯乙烯不对称环加成进行催化反应，发现这8个催化剂对1，1-二苯乙烯的不对称环丙烷化反应都表现出了一定的光学活性诱导能力，手性2，6-吡啶双噁唑啉-铜类具有比手性Schiff碱-铜类更好的催化性能。

To dye the different types of fibers by the same dye, universal dyes based on naphthalene ring system are prepared by the diazo coupling reaction of 7-acetamide-4-hydroxy-2-oaphtialene-β-(N,N-dimethylaminoethyl)solfonamide and m-aminobenzene-β-hydroxyethyl sulfone sulfunate.

为了实现用同一支染料对不同类型的纤维进行染色的目的，通过间氨基苯基－β-羟乙基砜硫酸酯与7-乙酰氨基－4-羟基－2-萘－β磺酰胺的重氮化偶合反应合成了含萘环的通用染料，其结构通过质谱分析进行了表征。

Three methods for the preparation of 1,2,4-trizolone~5 are provided. 22 compounds are prepared. 3, 4-disubstituted 1,2,4-trizolone-5 is prepared by reacting amide with ethyl hydrazine-fornate at 110癈 for 3h in the presence of phosphorus oxychloride, following neutralization and cyclization reaction, giving to 74.5 % yields,which is 30% more than the literature value.

以三氯氧磷为缩合剂，使酰胺和肼基甲酸乙酯在110℃反应3h，经碱中和、环化反应，合成3，4-二取代-1，2，4-三唑酮-5，两步反应总产率达74.5％，与文献报道值相比，高出了30％以上，在三唑酮类衍生物的合成方法中具有很大的突破性。

The premixing self-assembly solution of horseradish peroxide with poly(sodium 4-styrenesulfonate) is made by blending HRP and polyelectrolyte PSS,and the active.enzyme muhilayer biofilm is fabricated by altemate deposition of and PDDA on the surface of negative ionized PET.

以阳离子化的辣根过氧化物酶和阴离子聚苯乙烯磺酸钠的预混合溶液，与阳离子聚电解质聚二甲基二烯丙基氯化铵通过逐层组装，在阴离子化聚对苯二酸乙二酯表面构建了多层生物活性膜。

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。