Stereoselective Synthesis of 1,2,5,6-Tetrahydro 1,3-Oxaza-4-phospha-2-phosphorine 2-Oxides through Reaction of P-Diphenyl(alkyl) (N-diphenylphosphoryl)phosphazenes with Aldehydes and Ketones - Pérez, Emma Peralta; Ahrens, Birte; Davidson, Matthew G; Raithby, Paul R; Teat, Simon J; Álvarez, Isidro Pérez; Ortiz, Fernando López (Synlett, 2001)