乙酯

The production technology of triethyl ortho - formate as medicine intermediate is reviewed.

综述了医药中间体原甲酸三乙酯的生产工艺，重点介绍了二步法、一步法、氢氰酸法、酯交换法和相转移催化法的合成原理与生产工艺，并对这几种生产工艺进行了评述。

The reaction of sucrose with triethyl orthoacetate is carried out in DMF solution catalyzed with toluene p-sulphonic acid at ambient.

以DMF为反应介质，对甲苯磺酸催化原乙酸三乙酯与蔗糖室温下的环酯化反应。

Keywords triethyl phosphate;esterification reaction;phosphate oxychloride;synthesis

磷酸三乙酯；酯化反应；三氯氧磷；合成

Cyclic phosphate was synthesized from trimethylolalkane,triethyl phosphate and dimethyl methyl phosphonate,which can be used as environment-friendly durable flame retardant for the padding process of PET fabric.

以亚磷酸三乙酯、三羟甲基丙烷和甲基磷酸二甲酯为原料合成了环状磷酸酯，可作为涤纶织物浸轧用的环保型耐久阻燃剂。

Distearyl pentaerythritol diphosphite has been synthesized with pentaerythritol, triethyl phosphite and stearic alcohol.

以季戊四醇、亚磷酸三乙酯和十八醇为原料，在实验室合成了二硬脂基季戊四醇二亚磷酸酯。

Using Novozym 435 as catalyst, transesterification of ethyl ferulate with triolein to form ferulyl oleins in solvent-free medium was investigated.

以Novozym435脂肪酶为催化剂，以阿魏酸乙酯和三油酸甘油酷为底物，合成阿魏酸双油酸甘油酯。

The absorption and transport of umbelliferone, osthole, columbianadin, columbianetin acetate, angelolA and angelolB are passive diffusion as the dominating process in Caco2 cell monolayer model.

为了考察独活中香豆素类化学成分在整体口服实验中能否被吸收和吸收程度，本文首先采用Caco2细胞单层模型［8］研究独活中的主要化学成分伞形花内酯、甲氧基欧芹素、二氢欧山芹素、二氢欧山芹醇乙酯、当归醇A和当归醇B的吸收和转运。6种香豆素类成分的化学结构见图1。

In general, 80% or more of caffeine in raw tea can be removed by water-BA partition method, and the recovery of esterified catechins is about 70%.

水-丁基乙酯分配萃取方法一般可移除生茶粉中80%的咖啡因，而酯化型儿茶素也能回收大约70%。

Results The SiO2-ZrO2 composites were calcined at 200℃ prior to sulfating, the concentration of sulfuric acid was 1.0 mol/L ,the molar ratio of Si and Zr was 15, the calcination temperature was 500℃, the molar ratio of ethynol and lactic acid is 3/1, the yield of the ester could reach 92.7%.

结果SO4^2-／SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应适宜的反应条件为：预焙烧温度为200℃，浸泡硫酸浓度为1.0mol／L，硅锆摩尔比为15，焙烧温度为500℃，醇酸比为3时，酯化率可达92.79／6。

The results showed that Kaidimycin was chemically neutral, macrocylic polylactones, stable and liable to dissolve into water and pyridine, slight to dissolve into methanol, ethanol and N-butanol, difficult to dissolve into ethyl acetate, acetone, benzene and chloroform. Chemical reaction of functional group of Kaidimycin showed that it had glycoside, amino acid and aldehyde, no reducing sugar, polypeptide and phenol.

凯地菌素属中等极性的、中性抗生素，极性纸层析结果与多烯类抗生素的纸层析结果相似：易溶于水、吡啶，微溶于甲醇、乙醇、正丁醇，不溶于乙酸乙酯、丙酮、苯、三氯化碳；对高温、光照和紫外处理有很好的稳定性；官能团反应试验结果发现，凯地菌素可能含有糖苷键、氨基酸伯氨基和醛基，不含有还原糖、多肽和酚基，高锰酸钾、浓硫酸反应与多烯大环内酯类抗生素的特性相似；并且依据纯品，采用生物法和分光光度法对摇床发酵液进行了效价的测定。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。