摘要:
The metallo-phosphaalkenes (eta5-C5Me5)(CO)2FeP=C(R)(SiMe3) (Ia: R = SiMe3, Ib: R = Ph) and MeO2C-C=C-CO2 Me undergo a dipolar [3 + 2]-cycloaddition to afford the metallo-heterocycles [(eta5-C5Me5)(CO)Fe-C(O)-C(CO2Me)=C(CO2Me)-P=C(R)SiMe3] (IIIa,b) with exocyclic P=C double bonds.