Abstract
The synthesis of 4-alkoxy-1,3,2-oxazaphosphorinanes in the 3-oxo-2-aza-4,9-dioxa-3-phosphabicyclo- (4.3.0)nonane and 3-oxo-2-aza-4, 10-dioxa-3-phosphabicyclo-(4.4.0)decane series has been performed starting from azidoalcohols using intramolecular Staudinger reaction and reductive cyclisation.