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欧美污视频一区，經(jīng)新的六步反應(yīng)過程人与动人物XXXX国产AAAA片，合成阿比朵爾，總收率為34.6％国产淫秽视频网站。

KF/NaZnPO4 was used as the catalyst for Michael addition reaction of ethyl acetoacetate and acrylonitrile.

以磷酸鋅鈉負(fù)載KF為催化劑中字在线中文字幕，催化乙酰乙酸乙酯與丙烯腈進(jìn)行Michael 加成反應(yīng)。

Various reaction parameters such as ratio of ethyl acetoacetate to ethylene glycol,catalyst amount,reaction time and water-carrying reagent amount were studied.

討論了酯醇比免费看美女操蛋蛋、催化劑用量欧美人视频、反應(yīng)時間亚欧无码真人永久在线、帶水劑用量對酯化率的影響。最佳反應(yīng)條件為：n：n=1：1.8av成网站，催化劑用量為乙酰乙酸乙酯質(zhì)量的2%欧美一级高潮片黑人免费99，帶水劑用量為20mL，反應(yīng)時間3h色综合精品。

A series of methyl 2,7,7-trimethyl-5-oxo-4-aryl1,4,5,6,7,8- hexahydroquinoline -3-carboxylate were synthesized by the reaction of aromatic aldehydes,dimedone and methyl acetoacetate using ammonium acetate as catalyst in glycol under microwave irradiation with 82%～98% yields in 4～6 min.

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_6P_2W_(17)VO_(62) catalyst was prepared and characterized by FTIR,and synthesis of fraistone over as-synthesized catalyst from ethyl acetoacetate and 1,2-propylene glycol was investigated.

制備了Dawson型磷鎢釩酸銨催化劑三日本三级少妇三级，用FT-IR分析方法對催化劑進(jìn)行了結(jié)構(gòu)表征，并以乙酰乙酸乙酯與1欧美激情第一欧美精品完整版，2-丙二醇為原料催化合成了蘋果酯-B呻吟人妻一级无码AV。

The synthesis of celery ketone from butyl aldehyde and ethyl acetoacetate was improved with higher yield by using solid superbase(K2O/γ-Al2O3) for the first time.

在正丁醛和乙酰乙酸乙酯為原料合成芹菜酮的合成過程中，對其催化方法進(jìn)行改進(jìn)日韩福利一级视频在线播放网站免费。

The influence of reed produced allelopathy material eathyl-2-methyl acetoacetate on respiration action, photosynthesis action and antioxidant enzymes system of Microcystis aeroginosa were studied.

研究了蘆葦產(chǎn)生的化感物質(zhì)2-甲基乙酰乙酸乙酯對銅綠微囊藻呼吸作用日韩毛片免费高清在线视频、光合作用和抗氧化酶體系的影響。

Supported 12-Phosphotungstic Acid and Its Salts as Catalysts for the Synthesis of Fructone and Fructone-B;2. 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(wěn)Y沸石為載體的磷鎢酸及其銫鹽催化劑亚洲黄色精品在线，考察了催化劑在以乙酰乙酸乙酯和126uuu亚洲欧美另类，2-丙二醇為原料催化合成草莓酯反應(yīng)過程中的性能。

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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Objective To determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of Edaravone, by gas chromatography.

摘要］ 目的：用氣相色譜法測定依達(dá)拉奉合成起始原料乙酰乙酸乙酯中丙酮的殘留量。