L-Phenyl-3-methyl-5-pyrazoIone was synthesized by the reaction of ethyl acetoacetate and phenyl hydrazine in ethanol.

在無水乙醇的存在下精品黄色福利x，乙酰乙酸乙酯和苯肼為原料合成標(biāo)題化合物久久A毛片超清无码一区二区三区。

Their specific surface area and acid strength were measured, and their catalyt and SBA-15 were ic performance was evaluated in the synthesis of fructone by acetalization of ethyl acetoacetate with ethylene glycol.

用浸漬法制備了一系列負(fù)載型磷鎢酸及其銫鹽催化劑谁有黄色网址十八岁禁止，載體包括超穩(wěn)Y沸石88色哟哟、脫鋁超穩(wěn)Y沸石精品九九九在线视频免费看、SiO2和SBA-15男女啪啪视频入口欧美国产，測定了催化劑的比表面積和酸強度，并在乙酰乙酸乙酯與乙二醇液相縮合制取蘋果酯反應(yīng)中考察了催化劑的性能aigao激情在线视频。

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深夜15级A毛片免费视频，4-苯醌和乙酰乙酸乙酯為起始原料，經(jīng)新的六步反應(yīng)過程99拍一黄色视频,老师，合成阿比朵爾免费AV在线播放不卡，總收率為34.6％。

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為催化劑人人人人插人人干人人操，催化乙酰乙酸乙酯與丙烯腈進行Michael 加成反應(yīng)中日韩人人操人人干。

The synthesis of fructone from ethyl acetoacetate and ethylene glycol using sulfonated activated carbon as solid acid catalyst was investigated.

以活性炭磺化制得新型固體磺酸磺化炭為催化劑，對乙酰乙酸乙酯和乙二醇合成蘋果酯的催化工藝進行了系統(tǒng)研究91视频专区。

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

討論了酯醇比性感xxxxx、催化劑用量、反應(yīng)時間久综合久久、帶水劑用量對酯化率的影響在线观看国产更新视频播放器。最佳反應(yīng)條件為：n：n=1：1.8，催化劑用量為乙酰乙酸乙酯質(zhì)量的2%亚洲黄色第一页，帶水劑用量為20mL黄片少妇，反應(yīng)時間3h。

The strongly acidic cation exchange resin catalyzed synthesis of fructone-B by the reaction of ethyl acetoacetate and 1,2-propanediol was studied.

以硫酸高鈰銨為催化劑亚洲九九av，通過乙酰乙酸乙酯分別與乙二醇和1尹人影视，2-丙二醇反應(yīng)合成了蘋果酯-A和蘋果酯-B，研究了催化劑等有關(guān)因素對產(chǎn)品收率的影響色色色色精品视频。

_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久东京热，用FT-IR分析方法對催化劑進行了結(jié)構(gòu)表征，并以乙酰乙酸乙酯與1久久久国产AV一区二区，2-丙二醇為原料催化合成了蘋果酯-B亚日一级a。

Various affecting factors were investigated. When the amount of catalyst was about 0.5%（m-dihydroxybenzene,n／n）,the mole ratio of ethyl acetoacetate to m-dihydroxybenzene was 1.3∶1,the yield reached to 85.0% under 110℃ in 21 min.

考察了原料配比、催化劑用量和反應(yīng)溫度對產(chǎn)品收率的影響特级美女一级黄色一丝不挂A片，得到較適宜的合成條件為：在110℃下国产黄片高清无码在线观看，催化劑用量為0.5％人人操人人搞人人摸人与马，n∶n=1.3∶1時，反應(yīng)21 min欧美日韩美女一区，平行實驗的平均收率為85.0%自拍日韩制服丝袜视频。

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，對其催化方法進行改進亚洲污视频在线观看。