ISSN:
1434-1948
Keywords:
Phosphorus chemistry
;
Phosphonium salts
;
Diazadiphosphetidines
;
Phosphazoles
;
1-Azaallyl compounds
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
We report the preparation of the novel phosphonium salts [Ph2PaP(NR′2)N(R)C(tBu)=CbH]A(Pa-Cb) (2a; R′ = Et, R = SiMe3, A = Cl; 2b: R′ = Me, R = SiMe3, A = Cl; 2c: R = Et, R′ = SiMe3, A = [OSO2CF3]; 2d: R′ = Et, R = SiMe3, A = [BPh4]; 4: R′ = Et, R = H, A = Cl) and trans-1,3,2,4-diazadiphosphetidines R′2NPaN(R)P(NR′2)Nc(R)(Pa-Nc) [3a: R′ = Et, R = C(tBu)=C(H)PPh2; 3b: R′ = Me, R = C(tBu)=C(H)PPh2; 7: R′ = Me, R = C(tBu)=C(H)SiMe3]. Reaction of 3a with Cu2I2 led to the P- and P,P′-centred complexes [Cu(I)(3a)] (5a) and [{Cu(I)}2(3b)] (5b) [R = C(tBu)=C(H)PPh2]. The phosphazole NaC(tBu)C(H)CcPaN(Me)(CH2)2NcMe(Na-Pa)(Cc-Nc) (8) was obtained by a remarkable hetero-cycloaddition reaction from the diazadiphosphetidine ClPaN(R)P(Cl)NbR(Pa-Nb) [6: R = C(tBu)=C(H)SiMe3] and the electron-rich olefin [=CaN(Me)(CH2)2NaMe(Ca-Na)]2 and was oxidised with S8 yielding NaC(tBu)C(H)CcPa-(S)N(Me)(CH2)2NcMe(Na-Pa)(Cc-Nc) (9). Compounds 2-9 were characterised by multinuclear NMR spectroscopy, mass spectrometry for 5-9, while single-crystal X-ray diffraction data are provided for 3a and 5a.
Type of Medium:
Electronic Resource
