Flow Chemistry Syntheses of Styrenes, Unsymmetrical Stilbenes and Branched Aldehydes
作者:Samuel L. Bourne、Matthew O'Brien、Sivarajan Kasinathan、Peter Koos、Päivi Tolstoy、Dennis X. Hu、Roderick W. Bates、Benjamin Martin、Berthold Schenkel、Steven V. Ley
DOI:10.1002/cctc.201200778
日期:2013.1
Two tandem flow chemistry processes have been developed. A single palladium‐catalysed Heck reaction with ethylene gas provides an efficient synthesis for functionalised styrenes. Through further elaboration the catalyst becomes multi‐functional and performs a second Heck reaction providing a single continuous process for the synthesis of unsymmetrical stilbenes. In addition, the continuous, rhodium‐catalysed
已经开发了两种串联流化学方法。钯与乙烯气体的单催化Heck反应为官能化苯乙烯提供了有效的合成方法。通过进一步的精制,催化剂变为多功能,并进行第二次Heck反应,从而为不对称对苯二甲酸酯的合成提供了一个连续的过程。此外,苯乙烯衍生物与合成气的铑连续催化加氢甲酰化反应可提供具有良好选择性的支链醛。在线水洗和液-液分离相结合,使乙烯Heck反应可伸缩进入加氢甲酰化步骤,从而直接从芳基碘化物中直接合成支链醛。