Propylene epoxidation silylation

S, .S. .S )-Tri(isopropanol)arnine (14) is an efficient ligand for zirconium catalysts for cnantio-selective ring opening of epoxides with silyl azides (Section C.). It can be obtained either by the reaction of the commercially available starting materials ( + )-(5)-l-amino-2-propanol [(S)-alan-inol] and (-)-(5)-propylene oxide18, or directly from pure (iS)-propylene oxide and ammonia ... 

---