The present invention provides processes for synthesizing lysine based compounds of the formulawherein R1 may be, for example, (HO)2P(O)—, (NaO)2P(O)—, wherein X may be, for example, NH2, Y may be H, F, Cl, or Br, and wherein n, X′, Y′, R2, R3, R4, R5 and R6 are as defined herein.