A simple, environmentally friendly, tandem Knoevenagel condensation and Michael addition procedure is reported. The reactions between cyclic-13-diketones and a variety of aldehydes were carried out in water to afford tetraketones (64–99%). In this green synthetic protocol, the solvent water itself catalysed the reaction by hydrogen bonding, thus avoiding the use of any other catalysts to make the work up procedure easier.
报告采用了一种简单、环保的串联克诺文纳格尔缩合和迈克尔加成程序。环-13-二
酮类化合物与多种醛类化合物在
水中发生反应,生成四
酮类化合物(64-99%)。在这一绿色合成方案中,溶剂
水本身通过氢键催化反应,从而避免了使用任何其他催化剂,使合成过程更加简便。