An efficient method for the lipase-catalysed resolution and in-line purification of racemic flurbiprofen in a continuous-flow reactor

The lipase-catalysed kinetic resolution of flurbiprofen was performed in a flow-chemistry reactor allowing for a significant reduction of the reaction time compared to the classical batch method. The process was implemented by adding an in-line purification step of the exiting solution, consisting in a catch and release protocol, which allows easy separation and recovery of both (S)-flurbiprofen and (R)-flurbiprofen butyl ester with an enantiomeric excess ≥90% and a chemical purity >98%.