氯乙酸

With the catalyst TiO2/SO(superscript 2- subscript 4), 2, 4, N-trinitroanilinoacetic acid was synthesized from chlorobenzene and glycine with yield of 71.6%.

以纳米固体酸TiO2/SO(上标 2-下标 4)为催化剂，氯苯和氨基乙酸为原料直接合成了2，4，N-三硝基苯胺基乙酸，收率为71.6%。

The effects of the combination of three hormones, i.e. 1-naphthlcetic acid, 2,4-dichlorophenoxy acetic acid (2,4-D) and 6-benzylaminopurine (6-BA) on tissue culture progress in carnation (Dianthus carophyllus?? L.) were studied.

研究了1-萘乙酸、2，4-二氯苯氧乙酸(2，4-D)和6-苄基腺嘌呤(6-BA)等3种激素的质量浓度组合对康乃馨组织培养过程的影响。

A method for determining contents of seven kinds of residual organic solvents such as methanol, ethanol, methylene chloride, ethyl aetate, toluene, tetrahydrofuran and acetic acid in a new pharmaceutical-developing (UP0044) was established by capillary gas chromatography.

建立了测定新药UP0044中甲醇、乙醇、二氯甲烷、乙酸乙酯、甲苯、四氢呋喃、乙酸7种有机溶剂含量的方法，以确定它们在药物中的残留量和比例。

A series of p-toluene sulfonylamido acetacylhydrazone derivatives were synthesized from p-toluenesulfonyl chloride which reacted with glycine to get the intermediate p-toluene sulfonylamido glycine, then through the esterification, hydrazinolysis to afford another intermediate p-toluene sulfonylamido acethydrazide, which condensed with different aldehydes to obtain the target compounds that were characterized by IR, 1H NMR, 13C NMR spectra and elemental analysis.

魏太保 ；冷艳丽；王永成；张建辉；张有明*摘要：以对甲苯磺酰氯为原料，通过与氨基乙酸反应得到中间体对甲苯磺酰氨基乙酸，再经酯化、肼解得到对甲苯磺酰氨基乙酰肼，然后与相应的醛缩合得一系列对甲苯磺酰胺基乙酰腙类化合物。其结构经元素分析， IR， 1H NMR和13C NMR确证。

Then, the whole herb of Juncus effusus was extracted with 95% ethanol. The ethanolic extract was further separated with petroether, chloroform, ethyl acetate and methanol in turn to give four fractions.

用95%乙醇提取制备了总提取物，然后将总提物用石油醚、氯仿、乙酸乙酯、甲醇依次萃取，分成极性大小不同的部位，通过药理活性筛选后确定了有效部位为乙酸乙酯部分。

The main products are fatty acid methyl ester with an annual output of 6,000 tons, with an annual output of 1,000 tons Phytosterols, natural vitamin E oil, food and feed-grade class of natural vitamin E powder with an annual output of 1,200 tons, four with an annual output of 2,000 tons chlorobenzene quinone, crystalline acid Sodium, anhydrous sodium acetate with an annual output of 3,000 tons, and plasticizers to octyl phthalate, and other products, 30,000 tons more than the total output.

主要产品有脂肪酸甲酯年产6000吨，植物甾醇年产1000吨，天然维生素E油、食品级和饲料级天然维生素E粉年产1200吨，四氯苯醌年产2000吨，结晶乙酸钠，无水乙酸钠年产3000吨，以及增塑剂对苯二甲酸二辛酯，等系列产品，总产量30000吨以上。

In this method, titration with standard solution of perchloric acid in glacial acetic acid was used.

建立了在非水条件下快速测定食品中糖精钠的方法，以冰乙酸为溶剂，用高氯酸的冰乙酸标准溶液滴定，经过反复试验，相对标准误差0.92%~2.93%，加标回收率97.13%~100.3%，结果表明；该法定量分析准确，精确度高，可靠性和重现性好。

RESULTS: 12 compounds were isolated and identified as aurantiamide acetate (1), aurantiamide benzoate (2), physcion (3), scopoletin (4), vanillin (5), coniferyl aldehyde (6), syringaldehyde (7), syringic acid (8), luteolin (9), apigenin (10), azelaic acid (11), dotriacontanic acid (12), respectively.

结果：从羊耳菊全草的氯仿和乙酸乙酯部分共分离得到12个化合物，分别鉴定为橙黄胡椒酰胺乙酸酯(1)，橙黄胡椒酰胺苯甲酸酯(2)，大黄素甲醚(3)，东莨菪亭(4)，香草醛(5)，松柏醛(6)，丁香醛(7)，丁香酸(8)，木犀草素(9)，芹菜素(10)，壬二酸(11)，三十二烷酸(12)。

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用&一勺烩&方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

There is disclosed a process for preparing sucralose by using monogroup protection. These researches included the following: 1. The method of using triethyl orthoacetate is an effective method of preparing sucrose 6-acylates for protection 6-position hydroxyl group.

本课题以单基团保护法合成三氯蔗糖，主要开展了以下几方面的研究： 1、原乙酸三甲酯法合成蔗糖-6-乙酸酯是保护6-位羟基有效的方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。