Benzyl Alcohol → 3-(Octadecyloxy)-5-(3-phenoxypropoxy)phenylcarbamic acid phenylmethyl ester

Participants

Reaction Steps

To a suspension of 10.7 g (0.02 mol) 3-(octadecyloxy)-5-(3-phenoxypropoxy)benzoic acid in 250 ml of anhydrous toluene cooled in an ice bath was added 5.1 ml (0.024 mol) of diphenylphosphoryl azide followed by 3.8 ml (0.028 mol) of triethylamine. The reaction mixture was stirred in an ice bath for 1 hour and then heatedat 90° for 2 hours. After cooling to room temperature, 70 ml of benzyl alcohol was added. The reaction mixture was then stirred and heatedat 90° for 18 hours. The solvent was removed at reduced pressure andthe residue was dissolved in ethyl acetate. The extract was washed with saturated NaHCO3 solution, dried and concentrated to an oil which waspurified by HPLC using 10% ethyl acetate-hexane to give 10.9 g (85% yield, mp 68°-69°) of 3-(octadecyloxy)-5-(3-phenoxypropoxy)phenylcarbamic acid phenylmethyl ester. The structure was confirmed by nmr and mass spectra.

Provenance & Evidence