Chiral carbonyl hypoiodites.

Three chiral carbonyl hypoiodites, R-C(O)OI, have been prepared from N-protected ( S )-valine to give the ligand-stabilised ( S )-valinoyl hypoiodite complexes with 4-dimethylaminopyridine, 4-pyrrolidinopyridine, and 4-morpholinopyridine as the stabilising ligands. The identity of the complexes was established by NMR ( 1 H, 13 C, 1 H- 15 N HMBC) and single crystal X-ray diffraction analysis.