A new method for the synthesis of iron azadiene and diene complexes. Reaction of (η2-RCHCHCOR')Fe(CO)4 with aniline and ylide

Article abstract of DOI:10.1016/0022-328X(90)80203-C

The reactions of (η²-RCH=CHCOR')Fe(CO)4 (R = Ph, R' = H; R = H, R' = H and R = H, R' = CH3) with aniline or its derivative afforded η⁴-azadiene complexes 1, 2 and 3 in various yields.The azadiene ligands in 2 and 3 are too reactive to isolate at ambient temperature, but 2 and 3 are stable up to ca 110 deg C.Treatment of (ν²-CH2=CHCHO)Fe(CO)4 with Ph3PCHOOMe gave a η²-diene complex 4 which was converted to (η⁴-CH=CHCH=CHCOOMe)Fe(CO)3 on heating, or reacting with (CH3)3NO.