Bromo-2′,4′-dichloroacetophenone was synthesized in three steps,w hich were bromization ,chlorination and acylation,from glacial acetic acid and m -dichlorobenzene.

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ResultThe Buxus Microphylla leaf ethyl acetate extraction (high-dose and low dose) have obvious effect on reducing the serum total cholesterol and triglyceride, moreover, the high-dose ethyl acetate extract reducing blood lipid was better than the other extracts.

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The synthesis of the intermediate amidetriazinone was a crucial step in the synthesis of triazinone. Ethyl acetate was used as the initial material then was carried out for five steps hydrazine hydrate, triphosgene, chloroacetone, hydrazine hydrate respectively with the yield of 59.8%.

三嗪酮類化合物的合成關(guān)鍵是中間體氨基三嗪酮永久AV网站，本文以乙酸乙酯為起始原料，經(jīng)過酯的肼解亚洲最大人成在线视频、成環(huán)反應(yīng)无码下体流水性视频、胺的烷基化、酮和肼的縮合18禁黄黄污污网站在线看、酰胺的水解五步反應(yīng)合成中間體氨基三嗪酮亚洲已满18岁点击进入久久，其收率達(dá)59.8%。

Ingredients: water,decyl glucoside,glycerin,sodium cocoamphodiacetate,sodium pca,polysorbate-20,cocamidopropyl betaine,carya illinoensis powder,panthenol,carbomer,aloe barbadensis leaf juice,lavandula angustifolia oil,perfume,tetrasodium edta,lactic acid.

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The free fatty acids were extracted with petroleum ether and were separated on silicon gel column chromatography. The ethyl acetate-soluble lipid fraction and water-soluble lipid fraction were subjected to hydrochloric acid-catalyzed methanolysis, then were extracted with petroleum ether, respectively.

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Then we completed the first total synthesis of-Plakoridine A using Eschenmoser couping reaction as akey step. During the synthesis we found the choice of protecting groups and the configuration of the chiralcenter of the substrate play an important role to the key Eschenmoser reaction,so we think our successwould be of guide for synthesizing other polysubstituted pyrrolidines or piperidines.

在論文的第一章中，我們先以易得的對(duì)羥基苯乙酸乙酯為原料經(jīng)多步反應(yīng)制得了所需的β氨基酸酯国产Aⅴ一区二区三区四区，然后利用立體選擇性的Aldol縮合反應(yīng)和內(nèi)酰胺化反應(yīng)制得了Plakoridine Alactam岛国精品，隨后，以Eshenmoser縮合反應(yīng)為關(guān)鍵步驟完成了生物堿-Plakoridine A的首次不對(duì)稱全合成黄黄色色爱爱网。

To synthesize aryl pyrimidines by taking benzene, methyl benzene ,acetic ether,1,2-dichloroethane as solvent,the yield and purity of the product are high by taking methyl benzene as solvent.

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