p-Toluenesulfonyl azide → HCID 86641203, compound

Participants

Reaction Steps

To a solution of ethyl 3,5-bis(trifluoromethyl)phenylacetate (Step M, 26.0 g, 87 mmol) and 4-methylbenzenesulfonyl azide (Step L, 18.0 g, 91 mmol) in dry acetonitrile (150 mL) was added DBU (14.3 mL, 95 mmol) dropwise at −10° C. over 15 min with stirring. The mixture was stirred at −10° C. for a further 0.5 hr. The solvent was removed and the residue was partitioned between ether and water. The organic layer was washed with aqueous NaHCO3, brine, dried over Mg2SO4, and the solvent was removed. The residue was chromatographed (eluted with 9:1 hexane:ethyl acetate) to afforded a yellow solid. 1H-NMR (CDCl3): δ: 8.0 (2H, s), 7.68 (1H, s), 4.41 (2H, d, J=7.1 Hz), 1.40 (3H, t, J=7.1 Hz).

Provenance & Evidence