Water → HCID 22850138, compound

Participants

Reaction Steps

A solution of 4.3 g of isobutyl P-[2(R)-hydroxy-3-tosyloxy-propyl]-P-methyl-phosphinate and 1.5 g of sodium azide in 25 ml of dry dimethylformamide is heated to a temperature of 120° for a period of 3 hours under an inert gas atmosphere. The reaction mixture is allowed to cool to room temperature, poured onto 50 ml of water and extracted twice with 100 ml of ethyl acetate. The organic extract is dried over magnesium sulphate and the solvent removed under reduced pressure. The residue is chromatographed on silica gel using 5 parts of ethyl acetate to 1 part of ethanol as eluent. There is obtained isobutyl P-[3-azido-2(R)-hydroxy-propyl]-P-methyl-phosphinate as a viscous oil, 31P-NMR spectrum: δ=+54.8 and +53.7 ppm (CDCl3), [α]D25 =-15.8 (0.51% in ethanol).

Provenance & Evidence