Ethyl Acetoacetate

A Study on Asymmetry Reduction of Ethyl Acetoacetate of Bread Yeast in Organic Solvent

面包酵母非水相催化乙酰乙酸乙酯的不对称还原反应

Synthesis of α - Methyl Ethyl Acetoacetate by Enamine Alkylation

烯胺法合成α－甲基乙酰乙酸乙酯

A New Synthesis Method of Ethyl Acetoacetate

乙酰乙酸乙酯合成新方法

Study on the reaction mechanism of ethyl acetoacetate with tetra butyl titanate by infrared spectroscopy

用红外光谱研究钛酸四丁酯与乙酰乙酸乙酯的反应历程

Effect of Ethanol on the Tautomerism of Ethyl Acetoacetate in Supercritical Co_2

乙醇对超临界CO2中乙酰乙酸乙酯异构化平衡的影响

The enolization of ethyl acetoacetate was the key step of the reaction .

乙酰乙酸乙酯的烯醇化是反应进行的关键步骤。

? Methyl ethyl acetoacetate was synthesized by enamine alkylation , which was compared with water process method .

本文报道了α－甲基乙酰乙酸乙酯的烯胺法合成，探讨了烯胺法与水法的不同。

Synthesis of ketals of ethyl acetoacetate catalyzed by active carbon supported heteropoly acid under microwave irradiation

微波辐射活性炭负载杂多酸催化合成乙酰乙酸乙酯缩酮

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。

Synthesis of Ethyl Acetoacetate Cyclic Propylene-1,3 Ketal by Catalyst Iodine

碘催化合成乙酰乙酸乙酯1,3-丙二醇缩醛

The synthesis of6-methyluracil from ethyl acetoacetate and urea with PEG-400 as phase transfer catalyst was studied .

研究了聚乙二醇-400为相转移催化剂，乙酰乙酸乙酯和尿素合成6-甲基脲嘧啶的工艺条件。

Catalytic Performance of Phosphotungstic Acid ( Salt ) Supported on SiO_2 for Acetalization of Ethyl Acetoacetate with Glycol

SiO2负载磷钨酸（盐）催化剂对乙酰乙酸乙酯与乙二醇缩合反应的催化性能

METHODS New territrem B analogues 10a ~ 10l with the common structure of 2H-pyran-2-one were designed and synthesized from ethyl acetoacetate .

方法以乙酰乙酸乙酯为起始物，设计合成了含2H-吡喃-2-酮结构的化合物10a~10l；

In this paper , the synthesis process of acetylacetone has been studied , using ethyl acetoacetate and acetic anhydride as raw materials , . magnesium oxide as catalyst .

本文研究了以乙酰乙酸乙酯和乙酸酐为原料、氧化镁为催化剂，合成乙酰丙酮的工艺。

Hydroxy 4 methyl coumarin was prepared from resorcinol , ethyl acetoacetate or methyl acetoacetate in the presence of solid superacid catalyst .

在固体超强酸的催化下以间苯二酚、乙酰乙酸乙酯或乙酰乙酸甲酯为原料，合成了7-羟基-4-甲基香豆素。

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。

Using ethyl acetoacetate as an ligand , the pinacol coupling of some aromatic aldehydes mediated by TiCl_4-Al in CH_2Cl_2 had good chemoselectivity and diastereoselectivity .

在CH2Cl2中，以丙二酸二乙酯为配体，与TiCl4-Al组成的诱导体系对一些芳香醛的片呐醇偶联反应有好的化学选择性和非对映立体选择性。

3,5-Dimethyl-1H-pyrazole-4-carboxylic acid was synthesized from ethyl acetoacetate and acetyl chloride with the similar method by condensation , cyclization and hydrolysis , respectively in 52 % , 75 % and 85 % yield .

用类似的方法以乙酰乙酸乙酯和乙酰氯为原料，经缩合、环合和水解3步反应合成了3,5-二甲基-4-吡唑甲酸，3步反应的收率分别为52%、75%、85%。

Fructone was synthesized from ethyl acetoacetate and glycol in the presence of SO_4 ~ ( 2 - ) / TiO_2-MoO_3-La_2O_3.The factors influencing the synthesis were discussed and the best conditions were found out .

以稀土改性固体超强酸SO42-/TiO2-MoO3-La2O3为多相催化剂，对以乙酰乙酸乙酯和乙二醇为原料合成苹果酯的反应条件进行了研究。

Leflunomide , a new antirheumatoid arthritis drug was synthesized from the starting material ethyl acetoacetate , triethyl orthoformate , acetic anhydride , etc. Synthesis of acetoacetate esters using a new catalyst & triethylamine

以乙酸乙酯、原甲酸三乙酯、乙酸酐等为起始原料经缩合、环化等五步反应合成了新型免疫调节抑制剂抗类风湿性关节炎新药来氟米特.用新型催化剂三乙胺合成乙酰乙酸酯

Alumina aerogels of light nano mesoporous solid material are prepared from Al , n-butanol and ethyl acetoacetate by the sol-gel rute and the N_2 supercritical drying technique . Also , their photoluminescence properties are studied .

以铝、正丁醇、乙酰乙酸乙酯（EtAC）为原料，采用溶胶-凝胶法和N2超临界干燥技术制备出轻质纳米介孔固体Al2O3气凝胶，并对其光致发光特性进行了研究。

In the third chapter , a rapid and efficient method for the synthesis of coumarins from phenols with ethyl acetoacetate or methyl acetoacetate is described in the presence of zirconium sulfate tetrahydrate-silica gel under microwave irradiation .

第三部分：该部分介绍了微波辐射硅胶负载的四水硫酸锆催化，酚与乙酰乙酸甲酯或乙酰乙酸乙酯作用合成香豆素的方法。

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 .

分别以乙酰乙酸乙酯与双乙烯酮为原料（收率6%）、3-甲基-4-氯苯酚与氢氧化钾为原料（收率30-40%）合成了3，5-二羟基甲苯，解决了产品分离纯化问题。

The conversion of ethyl acetoacetate of 98.7 % with the selectivity of fructone above 97 % could be obtained over 30 % Cs_ 2.5H _ 0.5 PW / DUSY under the optimal reaction conditions .

在优化的反应条件下30%（质量分数）Cs2.5H0.5PW/DUSY催化剂上乙酰乙酸乙酯的转化率可达98.7%，苹果酯的选择性大于97%。

The optimum reaction conditions were found as follows : ethyl acetoacetate : alcohol : catalyst : agent to remove water is 1.0mol : 1.3mol : 5g : 100ml ; reaction temperature is reflux temperature ; reation time is about 3h .

考察了影响收率的因素，最佳条件为：乙酰乙酸乙酯：醇：催化剂：带水剂为1mol：1.3mol：5g：100ml，反应在回流温度下进行，反应时间约3h。

The title compound ( C 15 H 16 NO 3 ) has been synthesized by reaction of benzaldehyde , ethyl acetoacetate , ammonium acetate , isopropylidene malonate under microwave irradiation and its structure was determined by single crystal X ray diffraction .

标题化合物C15H16NO3由苯甲醛、醋酸铵、乙酰乙酸乙酯、麦氏酸在微波辐射下干反应而得。

The yield of Michael reaction of Ethyl acetoacetate and Crotonaldehyde catalyzed by KF / r - Al2O3 , MgO / r - Al2O3 , MgO / NaY all can reach to 80 % and the latter can reach to 90 % .

用微波法制备的KF／γ-Al2O3，MgO／γ-Al2O3和MgO／NaY催化剂催化乙酰乙酸乙酯与巴豆醛Michael加成反应时产率都可达到80%以上，其中后两者的产率达90%。

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。通过转化率和ee。