Condensation reactions in water of active methylene compounds with arylaldehydes. One-pot synthesis of flavonols.
作者:Francesco Fringuelli、Giosanna Pani、Oriana Piermatti、Ferdinando Pizzo
DOI:10.1016/s0040-4020(01)89287-5
日期:1994.1
with benzaldehyde were studied in water in heterogeneous phase in the presence and absence of anionic and cationic surfactants such as SLS, CTACl, (CTA)2SO4 and CTAOH. All the reactions occur with excellent yields. The cationic surfactants 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。