Azodicarbonsäureester und Diazoessigester als Reaktionspartner des Ferriophosphaalkens [Cp*(CO)2FeP=C(Ph)NMe2]
摘要:
Reaction of equimolar amounts of the ferriophosphaalkene [Cp*(CO)(2)FeP=C(Ph)NMe2] (1) and diethyl azodicarboxylate afforded the complex [(C5Me4CH2)(CO)(2)FeP<({CH(Ph)NMe2}-N(CO2Et)N=C(CO2Et)O)over bar> (3) as the result of a cheletropic [1 + 4] cycloaddition with subsequent transprotonation. The diazoacetates N-2=CHCO2R (8a:=tBu: 8b:Et) and 1 gave rise to the formation of the N-metallated 1,2,3-diazaphospholes [Cp*(CO)(2)FeN<(P=C(Ph)C(CO2R)=N])over bar> (11a, b). Compounds 3, 11a anti 11b were characterized by means of elemental analyses and spectroscopy (IR, H-1, C-13 {H-1}. The molecular structure of 11a was determined by X-ray diffraction analysis.