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- directed aldol condensation 定向醛醇缩合
- The prospect of the catalysts for aldol condensation is also been put forward. 羟醛缩合可以形成新的碳-碳键,增长碳链,是一类重要的有机反应。
- Aldol condensation is an important organic reaction which leads to the formation of new C-C bond. 摘要羟醛缩合可以形成新的碳-碳键,增长碳链,是一类重要的有机反应。
- Using inorganic base as a catalyst, 2,2-dimethylolbutyraldehyde was prepared by the aldol condensation from formaldehyde and butyraldehyde. 甲醛和丁醛在碱性催化剂的存在下,进行羟醛缩合反应,制备2,2二羟甲基丁醛。
- Conclusion:Piperidine shows satisfying effects and deserves further research as a promising catalyst in aldol condensation... 结论:以哌啶为催化剂,经羟醛缩合制备查尔酮类化合物具有一定的优越性,值得进一步深入研究。
- Trimethylolheptane (TMH) was synthesized through consecutive aldol condensation and Cannizzaro reaction of octylaldehyde and formaldehyde, using sodium hydroxide as catalyst. 以氢氧化钠为催化剂,辛醛和甲醛在较低温度下发生羟醛缩合反应生成2,2-二羟甲基辛醛。
- Butyrolactone series products are synthesized via aldol condensation, catalytic hydrogenation and oxidation reaction based on cyclopentanone and aliphatic aldehyde. 以环戊酮和脂肪醛系列为原料,经过羟醛缩合、催化加氢、氧化反应,三步制得丁位内酯系列产品。
- Eight flavones were synthesized through acetylation、methoxyl protection、aldol condensation and closing ring used 1,3,5-trihydroxylbenzene and resorcin as the initial materials. 以间苯二酚和间苯三酚为原料,经乙酰化、甲氧基保护、羟醛缩合、关环4步反应合成了8种黄酮。
- Abstract : The first histidine catalyzed direct aldol reactions of ketones with nitrobenzaldehydes in water and in poly(ethylene glycol) (PEG) were reported. 摘要 : 本文首次报道了组氨酸在水中和聚乙二醇中催化酮和对硝基苯甲醛间的直接羟醛缩合反应。
- In this paper,three kinds of catalysts are introduced and discussed according to the acid or base active site.The prospect of the catalysts for aldol condensation is also been put forward. 本文根据活性中心的不同,对酸性、碱性和酸-碱两性三类不同的催化剂进行了论述,分析了羟醛缩合反应催化剂今后的发展方向。
- In this paper, three kinds of catalysts are introduced and discussed according to the acid or base active site.The prospect of the catalysts for aldol condensation is also been put forward. 本文根据活性中心的不同,对酸性、碱性和酸-碱两性三类不同的催化剂进行了论述,分析了羟醛缩合反应催化剂今后的发展方向。
- Progress of aldol condensation using new catalysts 新型催化剂上醇醛缩合的进展
- Formaldehyde and acetaldehyde aldol condensation 甲醛和乙醛醛醇缩合
- Advances in Catalysts of Aldol Condensation 羟醛缩合催化剂研究进展
- asymmetric direct aldol reaction 不对称直接羟醛缩合
- She cast her eyes down to avoid direct eye contact. 她垂下双目以避免对视。
- The Aldol Condensation Mechanism of Acetone on Aluminum 氧化铝催化双分子丙酮缩合反应的机理
- The second decarboxylation of malonic acid in aldol condensation 丙二酸发生羟醛缩合时的二次脱羧反应
- I thought the law was directed against husbandmen. 我认为该法律是直接针对农民的。
- The complaints are directed at you. 这些牢骚是对你而发的。