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.

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Major procurement of goods: a three-chlorosilanes, dichloromethane, AE activity ester, 3-iodine Silane, special acid, pentyl chloride, triethylamine, thiadiazole, tetrazolylazo acid, 2 - Acetamide, tetrahydrofuran, the four-guanidine, isopropanol, five phosphorus trichloride, sodium vary bitter, acid, sodium phenylacetate, 6-2 silicon n-amine, Ethylacetoacetate , Methyl isobutyl ketone, potassium dihydrogen phosphate, aluminium oxide, DL methionine, N, N-dimethylaniline, NN-diethyl aniline, 4 sodium EDTA, Anhydrous sodium sulfate, ammonium sulfate, potassium sulfate, sodium acetate, sodium carbonate, DMC, formic acid, sodium chloride medicinal, oxalate, protopine, acetone, alcohol, acetic acid, vinegar Ethyl, butyl acetate, methanol, ethanol (anhydrous, industrial, medicinal), formaldehyde, Ye Jian (30%), hydrochloride (industrial-grade, refined grade, reagent level), sulfate (98%), Ammonia, calcium carbonate, chlorine dioxide, 6 - APA ,7-ACA ,7-ADCA ,7-ANCA, sulbactam, ceftazidime activity ester, Deng salt (hydroxymethyl-K, acid precursors Potassium, sodium dihydrogen methyl), resin, the enzyme, water treatment agent, Xiao Mo agent, demulsifier, flocculants, activated carbon, all kinds of medicinal materials, All kinds of additives

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Mission:"equality and mutual benefit, reputation first, unity and cooperation and friendship between the long-term" supply products: ethylenediamine; diethylamide; triethylamine; Diethylenetriamine; three ethylene diamine; three ethylene amines 40; 40 Five ethylene amines; five ethylene amines 6; caprolactam; DMF; allyl amine; N, N dimethylaniline; propylamine; are butylamine; are TOA; 3 Poly Cyanamide; 1,2 c diamine; ethanolamine; diethanolamine, triethanolamine; potassium iodide, potassium hydroxide, potassium permanganate, toluene, xylene, toluene of chlorine ; Acetone, butanone; acetylacetone; ethyl acetate, butyl acetate; Y-butyrolactone; DMC; acetyl of methyl acetate; Sanfu acetyl acid; Sanfu acetyl B Ethyl; methanol, ethanol, isopropanol; propylene glycol; glycerol; propargyl alcohol; 1.3 propylene glycol; xylitol; acetic acid; have acid; mercaptoacetic acid; vary Bitterness; adipic acid; trifluoroacetic acid; oxalic acid, the amino acid; o-amygdalin acid; DL-Acid; anhydrous piperazine; six non-piperazine, furfural, castor oil, ethylene Aldehyde; glutaraldehyde, multi-POM; isopropyl ether; anisole; tetrahydropyrrole; pure pyridine; 1.2 dichloroethane; methylene chloride, chloroform, carbon tetrachloride; hydrazine hydrate; Nonylphenol;-m-cresol; Se phenol; phenol; the tert-butyl phenol; Titanium Dioxide; iron; full Tangfen; Bisphenol A; azo two different nitrile; sodium azide; sodium carbonate ; Sodium chloride; iron oxide; cuprous chloride; thionyl chloride; D4; sodium bicarbonate; ammonia, potassium chloride; anhydrous sodium sulphite; ammonium persulfate; glycol Dingmi; B Glycol ether; calcium chloride; cyclohexanone; cyclohexane, methyl tertiary butyl ether, potassium carbonate, ferric chloride, potassium nitrate; Linsuansanna; zinc oxide; sodium nitrite; antimony oxide; Tartrate; OP-10; TX-10; tablets base; AES; sodium benzoate, sodium citrate; partial sodium silicate, sodium perborate, a sodium carbonate, sodium benzene; Asia sodium chlorate; Wuluo Care products; urea; hydrochloric acid, sulfuric acid, lactic acid; amino acid, hydrogen peroxide, ammonium bicarbonate

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A set of laser monitoring observation system to be used for measure the solubility with a high speed, which is programmed heating apparatus , have designed. The solubility of 1,2-cyclohexanediol were measured in water, methyl acetate, acetic ester, propyl acetate, butyl acetate, methyl acrylate, ethyl acrylate, acetoacetic ester at different temperature.

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objective to determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of edaravone, by gas chromatography.methods sample solution was injected on a gdx column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.the residue was calculated by the external standard method.results the linearity was good over the range of 25 μg/ml～400 μg/ml,with the correlation coefficient of acetone being 0.996 and the average recovery 96.8%.conclusions the method was proved to be simple,rapid,practical and highly sensitive.it is an efficient method for the quality control of acetoacetic ester.

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Mission:"equality and mutual benefit, reputation first, unity and cooperation and friendship between the long-term" supply products: ethylenediamine; diethylamide; triethylamine; Diethylenetriamine; three ethylene diamine; three ethylene amines 40; 40 Five ethylene amines; five ethylene amines 6; caprolactam; DMF; allyl amine; N, N dimethylaniline; propylamine; are butylamine; are TOA; 3 Poly Cyanamide; 1,2 c diamine; ethanolamine; diethanolamine, triethanolamine; potassium iodide, potassium hydroxide, potassium permanganate, toluene, xylene, toluene of chlorine ; Acetone, butanone; acetylacetone; ethyl acetate, butyl acetate; Y-butyrolactone; DMC; acetyl of methyl acetate; Sanfu acetyl acid; Sanfu acetyl B Ethyl; methanol, ethanol, isopropanol; propylene glycol; glycerol; propargyl alcohol; 1.3 propylene glycol; xylitol; acetic acid; have acid; mercaptoacetic acid; vary Bitterness; adipic acid; trifluoroacetic acid; oxalic acid, the amino acid; o-amygdalin acid; DL-Acid; anhydrous piperazine; six non-piperazine, furfural, castor oil, ethylene Aldehyde; glutaraldehyde, multi-POM; isopropyl ether; anisole; tetrahydropyrrole; pure pyridine; 1.2 dichloroethane; methylene chloride, chloroform, carbon tetrachloride; hydrazine hydrate; Nonylphenol;-m-cresol; Se phenol; phenol; the tert-butyl phenol; Titanium Dioxide; iron; full Tangfen; Bisphenol A; azo two different nitrile; sodium azide; sodium carbonate ; Sodium chloride; iron oxide; cuprous chloride; thionyl chloride; D4; sodium bicarbonate; ammonia, potassium chloride; anhydrous sodium sulphite; ammonium persulfate; glycol Dingmi; B Glycol ether; calcium chloride; cyclohexanone; cyclohexane, methyl tertiary butyl ether, potassium carbonate, ferric chloride, potassium nitrate; Linsuansanna; zinc oxide; sodium nitrite; antimony oxide; Tartrate; OP-10; TX-10; tablets base; AES; sodium benzoate, sodium citrate; partial sodium silicate, sodium perborate, a sodium carbonate, sodium benzene; Asia sodium chlorate; Wuluo Care products; urea; hydrochloric acid, sulfuric acid, lactic acid; amino acid, hydrogen peroxide, ammonium bicarbonate

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Ethyl 4,4,4-trifluoroacetoacetate was synthesized from ethyl acetate and 4,4,4-trifluoroacetate(mole ratio 3:1) with sodium ethoxide.

乙酸乙酯與三氟乙酸乙酯(摩爾比為3∶1)在乙醇鈉作用下進(jìn)行克萊森酯縮合反應(yīng)特级毛片A级毛片在线播放www，得到三氟乙酰乙酸乙酯三级片人夭视频网站。

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.

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Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethyl malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effective base.

在這類催化反應(yīng)中欧洲免费精品视频在线，堿的選擇具有重要的影響：以K3PO4為堿， Pd2/L1催化體系在丙二酸二乙酯的α-芳基化中免费在线黄色视频网.AAA...，富電子溴代芳烴顯示較好的活性网友自拍日韩视频在线观看免费； Pd2/L1催化的乙酰乙酸乙酯α-芳基化時(shí)，以 K2CO3為堿午夜影院妓女性爱视频，催化體系顯示較好的活性国产美女在线精品网站，這個(gè)催化體系可控制反應(yīng)得到α-芳基乙酰乙酸乙酯，而不是脫乙蹙肥炫雠鋈巳薃久久；漠a(chǎn)物操国产熟女。

Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethy malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effectiv base.

在這類催化反應(yīng)中，堿的選擇具有重要的影響：以K3PO4為堿国产高清美女一级a毛片久久，Pd2/L1催化體系在丙二酸二乙酯的α-芳基化中欧美XX网，富電子溴代芳烴顯示較好的活性http://91.伊人.com；Pd2/L1催化的乙酰乙酸乙酯α-芳基化時(shí)，以K2CO3為堿大色佬色色插入，催化體系顯示較好的活性97人人操.com，這個(gè)催化體系可控制反應(yīng)得到α-芳基乙酰乙酸乙酯，而不是脫乙蹙肪镁萌巳嗣基的產(chǎn)物黄片一区二区免费看。

acetacetic ether：乙酰乙酸乙酯

C010133 乙酰苯胺 acetanilid | C010169 乙酰乙酸乙酯 acetacetic ether | C010047 蟻酸 formic acid

ethyl acetoacetate：乙酰乙酸乙酯

縮合反應(yīng)機(jī)理酯分子中?-氫的酸性堿的強(qiáng)度交叉的 Claisen縮合 (Crossed Ester Condensation) 不含?-氫的酯乙酰乙酸乙酯 (Ethyl acetoacetate)烴基化及應(yīng)用乙酰乙酸乙酯 (Ethyl acetoacetate)烴基化及應(yīng)用

ethyl acetoacetate：乙酰乙酸乙酯(增香劑)

ethyl acetate 醋酸乙酯(增香劑) | ethyl acetoacetate 乙酰乙酸乙酯(增香劑) | ethyl acrylate 丙烯酸乙酯(增香劑)

acetoacetic acid：乙酰乙酸;乙酰醋酸

acetin method 乙酸酯法;醋精法[甘油定量方法] | acetoacetic acid 乙酰乙酸;乙酰醋酸 | acetobutyryl cellulose 乙(酸)丁(酸)纖維素

acetoacetic acid：乙酰乙酸,乙酰醋酸,丁間酮酸

acetoacetate | 乙酰乙酸 | acetoacetic acid | 乙酰乙酸,乙酰醋酸,丁間酮酸 | acetoacetic ester synthesis | 乙酰乙酸酯合成

acetoacetic ester：乙酰乙酸酯

acetoacetic acid 乙酰乙酸 | acetoacetic ester 乙酰乙酸酯 | acetoacetic ether 乙酰乙酸乙酯

acetoacetic ester：乙酰乙酸(乙)酯

acetoacetic acid 乙酰乙酸 | acetoacetic ester 乙酰乙酸(乙)酯 | acetoacetyl-acyl carrier protein 乙酰乙酰-豕檀挚诙园祝基載體蛋白

acetoacetic ether：乙酰乙酸乙酯

acetoacetic ester 乙酰乙酸酯 | acetoacetic ether 乙酰乙酸乙酯 | acetochlor 乙草胺

diacetic ester; ethyl acetoacetate：乙酰乙酸乙酯

乙酰乙酸 diacetic acid; acetoacetic acid | 乙酰乙酸乙酯 diacetic ester; ethyl acetoacetate | 二乙酸甘油酯;甘油二乙酸酯;二乙酰甘油 diacetin; diacetylglycine

barium ethyl acetoacetate：鋇乙酰乙酸乙酯

乙氧化鋇;乙醇鋇 barium ethoxide; barium ethylate | 鋇乙酰乙酸乙酯 barium ethyl acetoacetate | 乙硫酸鋇 barium ethyl sulfate