Sequential One-Pot Combination of Multireactions through Multicatalysis: A General Approach to Rapid Assembly of Functionalized Push−Pull Olefins, Phenols, and 2-Methyl-2<i>H</i>-chromenes
作者:Dhevalapally B. Ramachary、Kinthada Ramakumar、Adluri Bharanishashank、Vidadala V. Narayana
DOI:10.1021/cc100104k
日期:2010.11.8
the sequential cascade one-pot synthesis of library of highly substituted push-pull olefins, phenols and 2-methyl-2H-chromenes was reported through multicatalysis cascade (MCC) reactions. Direct sequential one-pot combination of amine- or amino acid-catalyzed cascade Knoevenagel/Michael/aldol condensation/decarboxylation with other reactions like amine- or amino acid-catalyzed cascade Claisen-Schmi
通过多催化级联反应(MCC),报道了一种通用,可持续和实用的方法,用于高度取代的推挽式烯烃,苯酚和2-甲基-2H-色烯的级联一锅法的顺序级联一锅合成。胺或氨基酸催化的级联Knoevenagel / Michael /醛醇缩合/脱羧与其他反应如胺或氨基酸催化的级联Claisen-Schmidt /异芳构化,Claisen-Schmidt /异构化,Claisen的直接连续一锅组合-Schmidt /异芳香化/异构化,Michael加成,Claisen-Schmidt / Michael,钌碱-二氧化硅催化的闭环复分解/碱诱导的开环/苄基氧化/ [1,7]-σ氢位移或钌碱热催化的开环复分解/碱诱导的开环/ [1,7]-乙酰乙酸烷基酯,各种醛和卤代烷的σ-亲氢转移反应以高收率提供了高度官能化的推挽式烯烃,酚和2-甲基-2H-色烯。产率和区域选择性良好至优异。提出了涉及在胺或氨基酸催化下原位形成新