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- The key step in the synthesis is Wittig coupling of farnesyltriphenylphosphonium bromide (8) with ethyl 2-oxo-3-methyl butyrate (3). (3) was prepared by Grignard reaction of ethyl oxalate with iso-propylmagnesium bromide. 其中关键步骤是溴化法呢基三苯基?(8)和2-氧代-3-甲基丁酸乙酯(3)的Wittig反应。
- Keywords gas chromatography thermal conductivity detector(TCD);ethyl oxalate;ethyl nitrite;ethyl formiate; 气相色谱;热导检测器;草酸酯;亚硝酸乙酯;甲酸乙酯;
- methyl ethyl oxalate 草酸甲,乙酯
- ethyl oxalate 草酸乙酯
- acid ethyl oxalate 草酸氢乙酯
- Objective:To synthesize escitalopram oxalate. 目的:合成草酸依地普仑。
- Pinacolone reacts with diethyl oxalate in presence of sodium methylate under refluxing to get both methyl and ethyl pivalopyruvates in 88% yield. 频哪酮与草酸二乙酯在甲醇钠存在下回流反应制得新戊酰丙酮酸酯,收率88%25;
- To introduce the ethyl group into(a compound). 使乙基化把乙基引入(一化合物)
- Mercury fulminate may contain trace of mercuric oxalate. 雷汞中可能含有微量的乙二酸汞。
- Prolong bake time can improve weatherproofing of oxalate coating. 延长烘烤时间,草酸盐转化膜的耐候性提高。
- Thus there is a greater calcium need to immobilize the oxalate. 因而需要较大量钙去固定草酸。
- Add 100 ml 0.0125 M sodium oxalate (Na2C2O4) to the solution. 加入100亳升的0.;0125M草酸钠溶液(Na2C2O4)。
- Ethyl acetate(71. 41b)was added to the slurry in the vessel. 把醋酸乙酯71.;4磅加到容器中的浆液内。
- Add 100 ml.0.0125 M sodium oxalate (Na2C2O4) to the solution. 加入100亳升的0.;0125M草酸钠溶液(Na2C2O4)。
- Ethyl lactate was synthesized with sodium bisulfate. 采用硫酸氢钠为催化剂合成乳酸乙酯。
- The oxalate ester peroxide is one of the give out light materials. 过氧草酸酯是一种最有效的化学发光物质之一。
- An alcoholic liquor distilled from grain, such as corn, rye, or barley, and containing approximately40 to50 percent ethyl alcohol by volume. 威士忌酒一种从谷类如玉米、黑麦或大麦等提炼出来含酒精液体,按容量包含约40%至50%的乙醇
- Results: The calcium oxalate crystal is lump crystal. 结果翻白草中草酸钙晶体呈块状,为“块晶”。
- Ethyl 3-aminobenzoate, methanesulfonic acid salt, 98... 3-氨基苯甲酸乙酯甲烷磺酸盐;
- Struvite and calcium oxalate stones are by far the most common. 最常见的是磷酸铵和草酸钙结石。