Efficient Tandem Morita-Baylis-Hillman/Double Cross-Aldol Reaction between Cyclic Enones and Formaldehyde Promoted by N-Methylpyrrolidine
作者:Krassimira P. Guerra、Carlos A. M. Afonso
DOI:10.1002/ejoc.201001612
日期:2011.4
The Lewis base N-methylpyrrolidine acts in water as an efficient promoter of tandem reactions between 2 cyclopenten-1-one and aqueous formaldehyde. The reaction pathway includes, as consecutive independent steps, a MBH reaction and a double cross-aldol reaction to furnish the new 2,5,5-tris(hydroxymethyl)-2-cyclopenten-1-one in excellent yield. A range of cyclic enones and 4-nitrobenzaldehyde undergo
路易斯碱 N-甲基吡咯烷在水中作为 2 环戊烯-1-酮与甲醛水溶液之间串联反应的有效促进剂起作用。反应途径包括作为连续独立步骤的 MBH 反应和双交叉羟醛反应,以优异的收率提供新的 2,5,5-三(羟甲基)-2-环戊烯-1-酮。一系列环烯酮和 4-硝基苯甲醛类似地进行串联反应。还研究了反应机理。