“…A conventional way to get the vicinal azido alcohols involves epoxides ring-opening (Benedetti et al, 1998 ; Fringuelli et al, 1999 ; Amantini et al, 2002 ; Badalassi et al, 2004 ; Nesterov and Kolodiazhnyi, 2007 ; Głowacka, 2009 ) or displacement of halohydrins (Draper, 1983 ; Iacazio and Réglier, 2005 ) under acidic/basic conditions with the application of different azide sources as well as chemoselectivity by the reduction of α-azido ketones (Rao et al, 1992 ; Ordóñez et al, 2003 ; Ankati et al, 2008 ). As an example, the opening of diethyl ( S )-2,3-oxiranepropylphosphonate with sodium azide in the presence of (NH 4 ) 2 SO 4 resulted in the formation of single regioisomer ( R )-3-azido-2-hydroxypropylphosphonate as well (Głowacka, 2009 ).…”