Pd-Catalyzed Regioselective Hydroformylation of Olefins with HCO 2 H and Its Derivatives.

An effective Pd-catalyzed regioselective hydroformylation process with N -formylsaccharin or 2,4,6-trichlorophenyl formate along with formic acid is described. Linear aldehydes can be obtained in up to 83% yield and >20:1 l/b ratio. The reaction is operationally simple without the need for external CO and H 2 .