Sodium hydride → 2-(4-Nitrophenyl)-4-tosylmorpholine

Participants

Reaction Conditions

Reaction Steps

N-(2-Hydroxy-2-(4-nitrophenyl)ethyl)-4-methylbenzenesulfonamide (I84) (0.610 g, 1.34 mmol) was sonicated in DCM (20 mL) for five minutes and cooled to 0° C. under nitrogen. A 60% dispersion of NaH (0.220 g, 5.44 mmol) was added and the mixture stirred for five minutes before (2-bromoethyl)diphenylsulfonium trifluoromethanesulfonate (1.21 g, 2.72 mmol) was added. The mixture was stirred for 17 hours, allowing the cooling bath to come to room temperature over this time. Ethyl acetate (200 mL), saturated ammonium chloride (80 mL) and water (20 mL) were added and the layers separated. The aqueous phase was extracted with ethyl acetate (2×100 mL) and the combined ethyl acetate phases were washed with brine, dried (sodium sulfate) and evaporated. The residue was chromatographed (Isolera, 40 g silica cartridge, 0-40% ethyl acetate/petroleum benzine 40-60° C.) to give the title compound (I85) (433 mg, 88%) as a white solid; 1H NMR (400 MHz, CDCl3) δ 8.22-8.18 (m, 2H), 7.63-7.59 (m, 2H), 7.52-7.48 (m, 2H), 7.33 (dd, J=8.5, 0.6 Hz, 2H), 4.71 (dd, J=10.2, 2.6 Hz, 1H), 4.10 (ddd, J=11.6, 3.4, 1.4 Hz, 1H), 3.87 (td, J=11.6, 2.7 Hz, 1H), 3.82-3.77 (m, 1H), 3.65 (ddt, J=11.6, 2.8, 1.6 Hz, 1H), 2.51 (td, J=11.6, 3.4 Hz, 1H), 2.43 (s, 3H), 2.18 (dd, J=11.5, 10.3 Hz, 1H). LCMS

Provenance & Evidence