名称:
Phosphenium-Übergangsmetallkomplexe XXVIII. PH-funktiionalisierte phosphametallacyclen C5R5(OC)2WPH(t-Bu)-X (RH, Me; XS, Se, Te) mit Dreiringstruktur
摘要:
The PH-functionalized phosphenium-complexes C(5)R(5)(OC)(2)W=PH(t-Bu) [R=H (2a), Me (2b)] perform [2 + 1]-cycloaddition with sulfur, selenium and tellurium to generate the three-membered phosphametallacycles C(5)R(5)(OC)(2)W-PH((t)Bu)-X (R=H, Me; X=S, Se, Te) (3a-f). 3e reacts with diazoaceticacidethylester (4) via insertion into the PH-bond to give Cp(OC)(2)W-P(N=NCH(2)CO(2)Et)(t-Bu)-Se (5), which undergoes a 1,3-hydrogen shift to produce Cp(OC)(2)W-P(NH-N=CHCO(2)Et)(t-Bu)-Se (5). Treatment of 3a with CCl4 affords Cp(OC)(2)W-PCl(t-Bu)-S (7), which was characterized by X-ray diffraction analysis.