with benzaldehyde were studied in water in heterogeneous phase in the presence and absence of anionic and cationicsurfactants such as SLS, CTACl, (CTA)2SO4 and CTAOH. All the reactions occur with excellent yields. The cationicsurfactants favour the reaction and the comparison with the corresponding tetrabutylammonium salts show that the micellar catalysis is effective mainly towards the dehydration
在存在和不存在阴离子表面活性剂和阳离子表面活性剂(例如SLS,CTACl,(CTA))的情况下,研究了苯乙醛,环己酮,异佛尔酮,苯乙腈,对硝基苯乙腈,(苯磺酰基)乙腈和茚与苯甲醛在异相水中的缩合反应。2 SO 4和CTAOH。所有反应均以优异的产率进行。阳离子表面活性剂有利于该反应,并且与相应的四丁基铵盐的比较表明,胶束催化主要对缩合之后的脱水反应有效。阴离子表面活性剂SLS是无活性的。在水性介质中以优异的产率制备了2'-羟基查耳酮,并且实现了一锅合成7-和3',4'-取代的黄酮醇。
Activation de la liaison C-H faiblement acide par adsorption sur KF-Al2O3
作者:Didier Villemin、Michèle Ricard
DOI:10.1016/s0040-4039(01)80100-3
日期:1984.1
VILLEMIN, D.;RICARD, M., TETRAHEDRON LETT., 1984, 25, N 10, 1059-1060
作者:VILLEMIN, D.、RICARD, M.
DOI:——
日期:——
[EN] CURABLE RESIN MIXTURE, CURABLE RESIN COMPOSITION, AND CURED PRODUCT<br/>[FR] MÉLANGE DE RÉSINE DURCISSABLE, COMPOSITION DE RÉSINE DURCISSABLE ET PRODUIT DURCI<br/>[JA] 硬化性樹脂混合物、硬化性樹脂組成物及びその硬化物
An efficientmethod for the synthesis of benzofulvenes 3 was demonstrated via the rapid condensation of indene with various aldehydes catalyzed using cesium hydroxide monohydrate. Single condensation products 3 and double condensation products 4 can be obtained as main products respectively by changing the ratio of the reactants easily.