Alkylation or arylation of heterosubstituted tricoordinated phosphorus compounds

Alkylation or arylation of heterosubstituted tricoordinated phosphorus compounds 

The arylation reaction can be extended to bis- and tris-(dialkylamino)phosphines73, but in the case of iV-ethylanilinophosphine the reaction takes place with a rearrangement of the phosphasemidine type483. A structural transposition also occurs in the alkylation of some N-silylaminophosphines484-487 (reaction 141). Finally, it is noteworthy that, as far as the tris(dimethylamino)phosphine is concerned, many polyhalomethyltris-(dimethylamino)phosphonium salts have been prepared by the action of the appropriate polyhalomethanes (reaction 142). 

In the formation of halophosphonium salts, the chlorophosphine alkylation occurs easily with diverse alkyl halides40 5fl-c. Generally, the reaction proceeds without any solvent or in CH2C12, with a Lewis acid such as A1C13, especially in the case of PC13 or RPC12 (reaction 143). Finally in heterophosphonium synthesis by the alkylation of 

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