A convenient synthetic route to substituted phosphavinyl Grignard reagents: synthesis and characterisation of [{RPC(But)MgX(OEt2)}2] (R = cyclohexyl, cyclopentyl, ethyl or mesityl; X = Cl or Br)†

Abstract

The regio- and stereo-selective addition of a series of Grignard reagents across the phosphaalkyne PCBu^t conveniently affords high yields of the phosphavinyl Grignard reagents, [{RPC(Bu^t)MgX(OEt₂)}₂] (R = cyclohexyl, cyclopentyl, ethyl or mesityl; X = Cl or Br), two of which have been structurally characterised.