In our research on study chemical reaction of active methylene compounds and brom-acetophenone. Because of brom-acetophenone is compound that contain carbonyl and halogen ,which will take place electrophilic substitution and nucleophilic addition. When active methylene compounds are ethyl acetoacetate and β-diketone, controlling reaction condition, we have found that mono-substitution's production and di-substitution's. production is isolated; active methylene compounds are acetoacetanilide and acetoacetanilide derivate, pyrrolidin-2-one derivants were obtained by substitution and close-ring reaction .but there is no report about it.

本文是讓活潑亞甲基類化合物與溴代苯乙酮發(fā)生化學(xué)反應(yīng)，由于溴代苯乙酮是含有羰基的鹵代烴結(jié)構(gòu)爱久免费在线观看视频，它可以發(fā)生親電取代和親核加成反應(yīng)啪啪啪av黄色，當(dāng)活潑亞甲基類化合物為乙酰乙酸乙酯和β-二酮時(shí)，控制反應(yīng)條件可以發(fā)生單取代和雙取代兩種產(chǎn)物18禁止网站观看大全；當(dāng)活潑亞甲基類化合物為乙酰乙酰芳胺類化合物來(lái)反應(yīng)時(shí)91极品福利精品国产，溴代苯乙酮中的羰基與氨基會(huì)發(fā)生分子內(nèi)的關(guān)環(huán)反應(yīng)生成吡咯烷-2-酮衍生物，這在以前的研究中是沒(méi)有發(fā)現(xiàn)的又粗又长又黄的免费视频。

Thus, 3 mol of Ethyl acetoacetate were treated with 2 mol of formaldehyde to yield 80% of I.

用2摩爾的甲醛處理3摩爾的乙酰乙酸乙酯可得到80%的I黄黄的在线网站。

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

在無(wú)水乙醇的存在下，乙酰乙酸乙酯和苯肼為原料合成標(biāo)題化合物最新在线精品国自产拍三级片。

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18岁免费看黄片，載體包括超穩(wěn)Y沸石、脫鋁超穩(wěn)Y沸石国产精品欧美亚洲韩国日本不卡、SiO2和SBA-15情欲视频,欧美一级在线观看，測(cè)定了催化劑的比表面積和酸強(qiáng)度，并在乙酰乙酸乙酯與乙二醇液相縮合制取蘋(píng)果酯反應(yīng)中考察了催化劑的性能日日爱自拍com。

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无码少妇一区二区三区av，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(guò)程白白在线视频免费费观看，合成阿比朵爾日本不卡的涩涩网站，總收率為34.6％。

ethyl acetoacetate：乙酰乙酸乙酯

縮合反應(yīng)機(jī)理酯分子中?-氫的酸性堿的強(qiáng)度交叉的 Claisen縮合 (Crossed Ester Condensation) 不含?-氫的酯乙酰乙酸乙酯 (Ethyl acetoacetate)烴基化及應(yīng)用乙酰乙酸乙酯 (Ethyl acetoacetate)烴基化及應(yīng)用

ethyl acetoacetate：乙基乙酰乙酸

柚子提取液 GRAPEFRUIT EXTRACT | 乙基乙酰乙酸 Ethyl Acetoacetate | 4-氨基萘-1-磺酸鈉 Sodium 4-Aminonaphthalene-1-Sulfonate

ethyl acetoacetate：乙酰乙酸乙酯(增香劑)

ethyl acetate 醋酸乙酯(增香劑) | ethyl acetoacetate 乙酰乙酸乙酯(增香劑) | ethyl acrylate 丙烯酸乙酯(增香劑)

ethyl acetoacetate：乙酰乙酸乙醋

酮酸 keto acid | 乙酰乙酸乙醋 ethyl acetoacetate | 亞硝基化合物 nitroso compound

diacetic ester; ethyl acetoacetate：乙酰乙酸乙酯

乙酰乙酸 diacetic acid; acetoacetic acid | 乙酰乙酸乙酯 diacetic ester; ethyl acetoacetate | 二乙酸甘油酯;甘油二乙酸酯;二乙酰甘油 diacetin; diacetylglycine