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"一勺燴"方法，以4-羥基苯甲腈為起始原料，首先與硫氫化鈉和無(wú)水氯化鎂在N，N-二甲基甲酰胺中反應(yīng)外国A级免费毛片，所得中間體不經(jīng)分離，直接加入2-氯乙酰乙酸乙酯進(jìn)行環(huán)合反應(yīng)日本巨乳中文字幕在线，得到2-(4-羥基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通過(guò)六亞甲基四胺/三氟乙酸進(jìn)行Duff反應(yīng)日本拍拍视频，得到2-(3-甲跖访阑仆就罚基-4-羥基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再經(jīng)鹽酸羥胺/甲酸/甲酸鈉體系脫水得到目標(biāo)化合物日韩人成精品视频免费播放在线。

The outlets of methane tetrachloride produced in the production facilities of chloromethane in China at present were proposed,such as conversion to diphenyl ketone ,ethylene tetrachloride,cinnamic acid,trichloroacetyl chloride,methane chloride and chloroform.

提出了目前我國(guó)氯甲烷生產(chǎn)裝置副產(chǎn)的四氯化碳的出路：轉(zhuǎn)化成二苯甲酮欧美特级黄色片AAAAXXXX、四氯乙烯、肉桂酸6080午夜久草、三氯乙酰氯欧美三级视频免费、一氯甲烷、氯仿欧美熟妇被草。

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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Synthesis of Antidote of N-Dichloroacetyl-2-methyl-1-oxa-4-aza-spiro-4.4-nonane BI Hong-mei, ZHANG Jin-yan, LIANG Ying, SHEN Yong (College of Arts and Sciences Heilongjiang August First Reclamation University, Daqing 163319, Heilongjiang, China) Abstract: N-Dichloroacetyl-2-methyl-1-oxa-4-aza-spiro-4.4-nonane was synthesized by one pot method with isopropanolamine, cyclopentanone and dichloroacetyl chloride. The optimum reaction conditions obtained are as follows:the proportion in moles of the above materials is 1∶1∶1.2, reaction solvent is toluene, reaction temperature is -15 to -10 ℃,reaction time is 3 h, under the optimum condition, the yield of the compound is 50.0%.

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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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Methods 2-(piperazin-1-yl)-1-(pyrrolidin-1-yl)ethanone (2) was synthesized from pyrrolidine via amidation and substitution, followed by treating with chloroacetyl chloride and triphenylphosphine in a "one pot" manner to give the corresponding phosphonium chloride 3 in a stable and pure form after crystallization from isopropanol.

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Our method featured employing the glycosyl donor with Bz as the protectivegroups and 0.05 equiv of TMSOTf as the promoter.

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Our method featured employing the glycosyl donor with Bz as the protective groups and 0.05 equiv of TMSOTF as the promoter.

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The asymmetric reduction of prochiral P-oxo ester, aromatic ketone and aliphatic ketone to its corresponding chiral alcohol by yeast cells were studied respectively in this work when ethyl 4-chloro-3-oxobutyrate, acetophenone and 2-octanone were as the model substrates.

本文以4-氯乙酰乙酸乙酯日韩色色图片、苯乙酮和2-辛酮分別為β-羰基酯、芳香酮和脂肪酮的模型底物中文字幕在线第一区，研究了利用活性酵母細(xì)胞催化這三類前手性酮不對(duì)稱還原合成相應(yīng)手性醇的反應(yīng)特性乱伦视频网站。

methyl acetanilide：甲基乙酰苯

methyclothiazide 甲氯噻嗪 | methyl acetanilide 甲基乙酰苯 | methyl acetate 乙酸甲酯

chloroacetophenone：氯乙酰苯

chloroacetonitrile 氯乙腈 | chloroacetophenone 氯乙酰苯 | chloroacetyl chloride 氯乙酰氯

chloroacetophenone：氯苯甲基酮 氯乙酰苯 氯乙酰苯

chloroacetonitrile 氯乙腈 | chloroacetophenone 氯苯甲基酮 氯乙酰苯 氯乙酰苯 | chloroacrolein 氯丙烯醛

CHLOROACETOPHENONE, SOLID：固態(tài)氯乙酰苯

CHLOROACETONITRILE 氯乙腈 6.1 2668 | CHLOROACETOPHENONE, SOLID 固態(tài)氯乙酰苯 6.1 1697 | CHLOROACETOPHENONE, LIQUID 液態(tài)氯乙酰苯 6.1 3416

CHLOROACETOPHENONE, LIQUID：液態(tài)氯乙酰苯

CHLOROACETOPHENONE, SOLID 固態(tài)氯乙酰苯 6.1 1697 | CHLOROACETOPHENONE, LIQUID 液態(tài)氯乙酰苯 6.1 3416 | CHLOROACETYL CHLORIDE 氯乙酰氯 6.1 1752

Methyl acetoacetate：乙酰乙酸甲酯

三氯乙烯 TRICHLOROETHYLENE | 乙酰乙酸甲酯 Methyl acetoacetate | 磷酸三苯脂 Triphenyl Phosphate

chloroacetic anhydride：氯乙酐

氯乙酐 chloroacetic anhydride | 氯丙酮 chloroacetone | 氯乙酰苯 chloroacetophenone

methylacetanilide：甲基乙酰苯

methyclothiazide甲氯噻嗪 | methylacetanilide甲基乙酰苯 | methylacetate乙酸甲酯

phenacyl chloride：苯甲酰甲基氯,氯乙酰苯

phenacyl bromide 苯甲酰甲基溴 | phenacyl chloride 苯甲酰甲基氯,氯乙酰苯 | phenacyl ester 苯乙酮酯

phenacyl chloride：苯甲酰甲基氯,氯乙酰苯

phenacyl bromide ==> 苯甲酰甲基溴 | phenacyl chloride ==> 苯甲酰甲基氯,氯乙酰苯 | phenacyl ester ==> 苯乙酮酯