The application of a monolithic form of triphenylphosphine to the Ramirez gem-dibromoolefination reaction using flow chemistry techniques is reported. A variety of gem-dibromides were synthesised in high purity and excellent yield following only removal of solvent and no further off-line purification. It is also possible to perform the Appel reaction using the same monolith and the relationship between the mechanisms of the two reactions is discussed.
报道了在流动化学技术中应用单体三苯基膦进行Ramirez的gem-二溴烯化反应。通过仅去除溶剂而无需进一步离线纯化,合成了多种高纯度和优良产率的gem-二溴化合物。还可以使用相同的单体进行Appel反应,并讨论了两种反应机制之间的关系。