Fig. 3
Batch and flow recyclability of MPC-1–2. a Recycle study with MPC-1–2LMW. Each recycle, additional 4b (0.25 mmol) and HE (0.375 mmol) were added to the recovered MPC-1–2LMW catalyst (1 mol%, approximated as 1529 g mol−1) originating from the zeroth cycle; the reaction vessel was sealed, thrice evacuated/argon-backfilled, filled with 0.5 mL argon-sparged acetone, then stirred at 37 °C under blue LED irradiation for 3 h. MPC-1–2LMW was recovered by diluting the reaction mixture with 0.5 mL methanol and passing it through a fritted glass funnel; the catalyst was then returned to the reaction vessel by spatula or by passing it through the frit with dichloromethane. b Flow chemistry with MPC-1–2HMW as a thin-film coating. Reaction conditions: 4b (0.7 mmol, placed in the reservoir), HE (1.05 mmol, placed in the reactor cell), acetonitrile (3.5 mL, argon-sparged), argon atmosphere, peristaltic circulation through an MPC-1–2HMW-coated (2.5 mol%) reactor cell under blue LED irradiation, 37 °C, 26 h
