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- Nefedipine was synthesized with m-Nitrobenzaldehyde, ethyl acetoacetate, animonium acetate. 摘要以間硝基苯甲醛，乙酰乙酸乙酯，氨化試劑為原料。
- A1_20_3 sol is prepared by using Al(O-sec-Bu)3 chelated with ethyl acetoacetate(EAcAc) as precursor. 本文以乙酰醋酸乙酯(EAcAc)螯合的異丁醇鋁為前驅物制備出了A1_20_3溶膠。
- Nefedipine was synthesized with m-Nitrobenzaldehyde,ethyl acetoacetate,ammonium acetate. 以間硝基苯甲醛,乙酰乙酸乙酯,氨化試劑為原料。
- METHODS Bropirimine was synthesized by 3 steps reaction of acylation, cyclization and bromination with ethyl acetoacetate as staring material. 方法以乙酰乙酸乙酯為起始原料,經(jīng)?；?、環(huán)合、溴化3步反應合成溴匹立明。
- A new type of apple ester-B is synthesized by condensation reaction of ethyl acetoacetate and 1,2- propanediol,Using Fe 3+ -UR as catatlyst. 以Fe3 ＋ － UR 為催化劑，催化乙酰乙酸乙酯和1 ，2 － 丙二醇縮合反應合成了新型香料蘋(píng)果酯－ B。
- Fructone was synthesized from ethyl acetoacetate and glycol using activated carbon supported phosphotungstic acid as catalyst. 以活性炭負載磷鎢酸為催化劑合成了蘋(píng)果酯,確定了反應的最優(yōu)條件。
- With 1,4-bezenoquinone and ethyl acetoacetate as the starting materials, it had been prepared in a novel six-step procedure in overall yield of 34.6%. 以1，4-苯醌和乙酰乙酸乙酯為起始原料，經(jīng)新的六步反應過(guò)程，合成阿比朵爾，總收率為34.;6%25。
- The strongly acidic cation exchange resin catalyzed synthesis of fructone-B by the reaction of ethyl acetoacetate and 1,2-propanediol was studied. 采用強酸性陽(yáng)離子交換樹(shù)脂為催化劑,以乙酰乙酸乙酯、1,2-丙二醇為原料合成蘋(píng)果酯-B。
- Fructone-A and Fructone-B was synthesized from ethyl acetoacetate and ethanediol or 1,2-propanediol using ammonium ceric sulfate as catalyst. 以硫酸高鈰銨為催化劑,通過(guò)乙酰乙酸乙酯分別與乙二醇和1,2-丙二醇反應合成了蘋(píng)果酯-A和蘋(píng)果酯-B,研究了催化劑等有關(guān)因素對產(chǎn)品收率的影響。
- The resulted IR Spectrum makes it possible to determine the reaction mechanism of ethyl acetoacetate with tetra butyl titanate. 得到的紅外光譜使其決定鈦酸四丁酯與乙酰乙酸乙酯的反應歷程。
- Optically active ethyl(S)-3-hydroxybutyrate,a useful chiral synthon,was prepared by stereoselective reduction of ethyl acetoacetate of the bread yeast in organic solvent. 利用面包酵母在非水相中不對稱(chēng)還原乙酰乙酸乙酯,制備了光學(xué)活性的手性化合物S()-3-羥基丁酸乙酯。
- The fraistone of new type perfume was synthesized with ethyl acetoacetate and 1,2 - propanediol as raw materials by the novel catalyst of polymer compound (FeCI3 - AICI3 - UR). 以乙酸乙酸乙酯和1，2一丙二醇為原料，在新型高分子復合催化劑FeCI3－AICI3－UR的催化作用下合成了新型香料草莓酯。
- Keto-enol tautomerizing of ethyl acetoacetate was studied by UV.It was conformed that the content of enol ethyl acetoacetate decreased with the increasing polarity of solvents. 本文以紫外光譜為手段研究乙酰乙酸乙酯的酮-烯醇式互變異構現象;所得結果證實(shí)其烯醇式含量隨溶劑極性的增加而減少。
- Edaravone, a free radical scavenger, was synthesized by condensation of ethyl acetoacetate withphenylhydrazine in presence of NaHSO3 in water at pH 6 for 2h in a yield of 83%. 用苯肼和乙酰乙酸乙酯在亞硫酸氫鈉參與下于水中回流反應2h制得自由基清除劑依達拉奉,收率83%25。方法操作簡(jiǎn)單,成本低。
- Benzoyl chloride and ethyl acetoacetate react and hydrolyze in the presence of a catalyst to synthesize ethyl benzoylacltete,yielding 60%,with a purity of more than 98%. 苯甲酰氯與乙酰乙酸乙酯催化水解合成苯甲酰乙酸乙酯。收率60%25，產(chǎn)品純度98%25以上。
- METHODS We used ethyl acetoacetate as the starting material to prepare sodium houttuyfonate successfully via a three-step procedure resulting in the total yield of 30%. 方法以乙酰乙酸乙酯為原料，經(jīng)取代、堿水解及脫羧制得關(guān)鍵中間體甲壬酮；
- Thus, 3 mol of Ethyl acetoacetate were treated with 2 mol of formaldehyde to yield 80% of I. Addn. of I at 0.01 g to a vanilla flavor compn. enhanced the flavour by making it more natural and imparting a coumarin-like, coconut-like aroma. 如：用2摩爾的甲醛處理3摩爾的乙酰乙酸乙酯可得到80%25的I。將0.;01g的I添加到香草風(fēng)味的芳香化合物中;可使其香味更加自然并具有香豆素及椰子的香味。
- Ethyl acetoacetate was chosen as the model substrate. The effects of heating temperature and heating time during the pretreatment of baker'yeast cells on the conversion and stereoselectivity of the reduction reaction were investigated. 并且選取乙酰乙酸乙酯為底物,進(jìn)一步研究了加熱預處理溫度和時(shí)間對面包酵母還原乙酰乙酸乙酯轉化率及ee值的影響。
- A series of 12-phosphotungstic acid(PW)and their Cs salts catalysts supported on dealuminated ultra-stable Y zeolite(DUSY)were prepared. Their catalytic activities were measured by synthesis of fructone-B from ethyl acetoacetate and 1,2-propanediol. 制備了一系列以脫鋁超穩Y沸石(DUSY)為載體的磷鎢酸(PW)及其銫鹽催化劑,考察了催化劑在以乙酰乙酸乙酯和1,2-丙二醇為原料催化合成草莓酯反應過(guò)程中的性能。
- Synthesis 3, 5-dihydroxytoluene by ethyl acetoacetate and diketene as material ( yield 6%), by 3-methyl-4-chlorophenol and KOH as material (yield 30-40%) respectively, It was solved for product separation and purify. 分別以乙酰乙酸乙酯與雙乙烯酮為原料(收率6%25)、3-甲基-4-氯苯酚與氫氧化鉀為原料(收率30-40%25)合成了3，5-二羥基甲苯，解決了產(chǎn)品分離純化問(wèn)題。
