880343-42-0Relevant articles and documents
Synthesis of Primary and Secondary Phosphines by Selective Alkylation of PH3 under Phase Transfer Conditions
Langhans, Klaus P.,Stelzer, Othmar
, p. 203 - 211 (2007/10/02)
Primary phosphines, RPH2, may be synthesized selectively by alkylation of phosphine, PH3, with alkyl halides RX (R = Me, Et, n-Bu, 2-Bu, C16H33, CH2=CH-CH2, Ph-CH2, 2-Py-CH2-CH2; X = Cl, Br) and concentrated aqueous KOH as auxilliary base in dimethylsulfoxide as a solvent or in two phase systems employing phase transfer catalysts.Under more rigorous conditions secondary phosphines R2PH (R = Me, n-Bu, CH2=CH-CH2) are also acessible in good yields.Using 1,3-dibromo(chloro)-propane or -butane diprimary phosphines H2P-(CH2)2-CHR-PH2 (R = H, Me) are obtaines, while 1,4-dibromopentane in a high yield cyclization reaction leads to 2-methylphospholane (12) with a chiral C-atom in α-position.
FUNKTIONELLE TRIMETHYLPHOSPHINDERIVATE. 16. Ueber die Reaktion von Tertiaeren Phosphinen mit Methylendihalogeniden
Karsch, Hans H.
, p. 217 - 226 (2007/10/02)
The reaction of PMe3 with CH2X2 (X = Cl, Br) has been examined.In alcohol (ROH), X, Me3PO and RX (from X as an isolable intermediate) are formed.The first reaction step produces X, which may be isolated in the absence of alcohol and for X = Cl only.For X = Br (in benzene solution), also an ylidic salt is obtained (X), which confirms the suggestion of an ylidic intermediate (Me3PCH2) in the above reaction.
