A convenient and simple one-pot method is described for the synthesis of phosphonites [RP(OEt) 2 , 1] and H-phosphinates [HP(O)R(OEt), 2] from triethyl phosphite and appropriate Grignard reagents. ... A convenient and simple one-pot method is described for the synthesis of phosphonites [RP(OEt) 2 , 1] and H-phosphinates [HP(O)R(OEt), 2] from triethyl phosphite and appropriate Grignard reagents. ... Despite the importance of 1 and 2 as precursors, ...