Anita H. van Oijen,? Nina PM Huck, John A. W. Kruijtzer, Cees Erkelens, Jacques H. van Boom, and Rob M. J. Liskamp'J ... Department of Organic Chemistry, Gorlaeus Laboratories, University of Leiden, PO Box 9502, 2300 RA Leiden, The Netherlands ... The syntheses of two amino acid based phosphodiester linkage-containing cryptands (30 and 44) as well as diphosphorylated macrocycles (28,29,32 and 33) are described. Boc-L-Ser(Bn)-OH and/or Boc-D-Ser(Bn)- ...