An autorecycling system for the specific 1,4-reduction of α,β-unsaturated carbonyl compounds by 1,5-dihydro-5-deazaflavin

A useful autorecycling system for the specific 1,4-reduction of α,β-unsaturated carbonyl compounds to the corresponding saturated carbonyl compounds using a 10-aryl-5-deazaflavin and formic acid is reported.