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- ethyl acetoacetate chelate 乙酰乙酸乙酯螯合物
- Nefedipine was synthesized with m-Nitrobenzaldehyde, ethyl acetoacetate, animonium acetate. 摘要以间硝基苯甲醛，乙酰乙酸乙酯，氨化试剂为原料。
- 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)螯合的异丁醇铝为前驱物制备出了A1_20_3溶胶。
- Nefedipine was synthesized with m-Nitrobenzaldehyde,ethyl acetoacetate,ammonium acetate. 以间硝基苯甲醛,乙酰乙酸乙酯,氨化试剂为原料。
- 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为起始原料,经酰化、环合、溴化3步反应合成溴匹立明。
- 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 为催化剂，催化乙酰乙酸乙酯和1 ，2 － 丙二醇缩合反应合成了新型香料苹果酯－ B。
- Fructone was synthesized from ethyl acetoacetate and glycol using activated carbon supported phosphotungstic acid as catalyst. 以活性炭负载磷钨酸为催化剂合成了苹果酯,确定了反应的最优条件。
- 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为起始原料，经新的六步反应过程，合成阿比朵尔，总收率为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. 采用强酸性阳离子交换树脂为催化剂,以乙酰乙酸乙酯、1,2-丙二醇为原料合成苹果酯-B。
- Fructone-A and Fructone-B was synthesized from ethyl acetoacetate and ethanediol or 1,2-propanediol using ammonium ceric sulfate as catalyst. 以硫酸高铈铵为催化剂,通过乙酰乙酸乙酯分别与乙二醇和1,2-丙二醇反应合成了苹果酯-A和苹果酯-B,研究了催化剂等有关因素对产品收率的影响。
- The resulted IR Spectrum makes it possible to determine the reaction mechanism of ethyl acetoacetate with tetra butyl titanate. 得到的红外光谱使其决定钛酸四丁酯与乙酰乙酸乙酯的反应历程。
- 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对称还原乙酰乙酸乙酯,制备了光学活性的手性化合物S()-3-羟基丁酸乙酯。
- 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1，2一丙二醇为原料，在新型高分子复合催化剂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. 本文以紫外光谱为手段研究乙酰乙酸乙酯的酮-烯醇式互变异构现象;所得结果证实其烯醇式含量随溶剂极性的增加而减少。
- 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亚硫酸氢钠参与下于水中回流反应2h制得自由基清除剂依达拉奉,收率83%25。方法操作简单,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%. 苯甲酰氯与乙酰乙酸乙酯催化水解合成苯甲酰乙酸乙酯。收率60%25，产品纯度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为原料，经取代、碱水解及脱羧制得关键中间体甲壬酮；
- 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摩尔的甲醛处理3摩尔的乙酰乙酸乙酯可得到80%25的I。将0.;01g的I添加到香草风味的芳香化合物中;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. 并且选取乙酰乙酸乙酯为底物,进一步研究了加热预处理温度和时间对面包酵母还原乙酰乙酸乙酯转化率及ee值的影响。
- 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. 制备了一系列以脱铝超稳Y沸石(DUSY)为载体的磷钨酸(PW)及其铯盐催化剂,考察了催化剂在以乙酰乙酸乙酯和1,2-丙二醇为原料催化合成草莓酯反应过程中的性能。
