Synthesis of new cyclopentadienyl-, indenyl- and fluorenylphosphanes by the reaction of carbanions of the cyclopentadienyl type with alkyl(aryl)chloro-N,N-dialkylaminophosphanes

A number of alkyl(aryl)chloro-NN-dialkylaminophosphanes RP(Cl)(NRR2)-R-1 (1 a-o) were synthesized starting from alkyl(aryl)dichlorophosphanes RPCl2 and amines by a convenient procedure with nearly quantitative yields. The reac tivity of alkyl(aryl)-NN-dialkylamino(halogeno)phosphanes RP(Hal)(NRR2)-R-1 (Hal = Cl, I) with cyclopentadienyl, bis(cyclopentadienyl), indenyl, bis(i ndenyl) and fluorenyl carbanions has been investigated. The new aminocyclop entadienylphosphanes RnCp(R)(PNRR2)-R-1 2a-f and 3a-c (RnCp = Ind, Flu, Cp2 CMe2, Ind(2)CEt(2), Ind(2)(CH2)(2)) were characterized by spectroscopic tec hniques and elemental analyses. Flu(t-Bu)PN(H)t-Bu (2f) was characterized b y X-ray diffraction analysis.