We report a continuous flow, rhodium-catalysed hydro- formylation of various styrenes using a tube-in-tube gas-liquid re- actor. The flow process afforded selectively branched aryl aldehydes in good yields.
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 flowchemistry 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