克莱森-施密特反应 主要内容:在碱的作用下,芳香醛与脂肪醛或酮发生缩合,形成具有高化学选择性的α,β-不饱和醛或酮。 具体反应如下: Claisen-Schmidt Reaction 通式 反应机理如下: Claisen-Schmidt Reaction 机理 机理解释:通过碱拔掉酮的α-H,形成碳负离子,碳负离子通过烯醇互变(含有多种共振结构稳定性更高,更...
The two procedures offered easy access to 1,3-benzodioxole-bearing indole-based chalcone in short reaction time and good yield under mild conditions.%3-乙酰基-2-氯-1-(4-氯苄基)吲哚与胡椒醛通过超声辅助或无溶剂的Claisen-Schmidt缩合反应首次合成含胡椒环的吲哚查尔酮,即(E)-3-(5-胡椒基)-1-(2...
1.β-nitrostyrene was synthesized by ultrasonic Henry reaction and the accessory ingredient of alcohol Claisen-Schmidt reaction,using benzaldehyde and nitromethane as raw materials.分别研究了在超声波辅助Henry反应和甲醇助剂存在Claisen-Schmidt反应的条件下由苯甲醛、硝基甲烷合成β-硝基苯乙烯的反应条件,发现Clais...
Key words: nea r - critica l water ; benzaldehyde ; acetone ; Claise n - Schmid t condensatio n reaction ) ( (上接 10 页) ) ( Synthesi s o f 1 - Ethoxymethyl - 6 -[( 1 - Naphthyl)methyl] Thymine LU O You - f u 1 , MEN G Ge 2 , CHE N Fe n - e r 2 ( 1 ....
G. (1995). Claisen-Schmidt reaction in a hydrotropic medium. Journal of Chemical Technology and Biotechnology, 62, 405-410.Sadvilkar, V.G., Samant, S.D. and Gaikar, V.G. "Claisen-Schmidt reaction in a hydrotropic medium", Journal of Chemical Technology & Biotechnology, Vol. 62, pp. ...
10.Design, synthesis, characterization of some new 1,2,3-triazolyl chalcone derivatives as potential anti-microbial, anti-oxidant and anti-cancer agents via a Claisen-Schmidt reaction approach[J].Bhat;Manjunatha;Nagaraja;G. K.;Divyaraj;P.;Harikrishna;N.;Pai;Sreedhara Ranganath K.;Biswas;Subhank...
The Claisen-Schmidt condensation is a variant of the Aldol condensation where at least one of the carbonyl partners lack α-hydrogens. The reaction was independently reported by Rainer Ludwig Claisen and J. Gustav Schmidt in 1881. Mechanism of the Claisen-Schmidt CondensationReferences...
Keywords: Aldehydes, Crossaldol reaction, Ketones, Magnesium hydrogen sulfate Full-Text Cite this paper Add to My Lib Abstract: Cross aldol condensations of ketones with aromatic aldehydes are carried out efficiently in the presence of magnesium hydrogen sulfate under solvent – free conditions in...
It involves the condensation between an aromatic aldehyde (or a ketone) with an aliphatic aldehyde or a ketone in presence of dilute alkali to form alpha, beta- unsaturated compounds. For example, In presence of excess benzaldehyde, the benzalacet
3) Claisen reaction 克莱森酯缩合反应4) Gram-Schmidt algorithm 克莱姆施密特法则5) Kleinschmidt printer 克莱因施密特打印机 例句>> 6) Kleinschmidt technique 克莱因施密特技术补充资料:克莱森-施密特反应 分子式:CAS号:性质:芳香族醛与脂肪族或脂肪芳香族的醛、酮、腈类等在氢氧化钠水溶液或醇钠的...