4-Toluenesulfonyl chloride → HCID 131718418, compound

Participants

Reaction Steps

To a solution of (2S,4R)-1-p-methoxybenzyloxycarbonyl-4-methanesulfonyloxypyrrolidine-2-methanol (8.7 g: 24.2 mmole) in dichloromethane(80 ml) are added triethylamine (4.05 ml), p-toluenesulfonyl chloride (5.08 g) and 4-dimethylaminopyridine (148 mg). The mixture is stirred at room temperature overnight. The reaction mixture is washed with water and brine, dried over magnesium sulfate, and concentrated in vacuo. The residue is purified by silica gel column chromatography (toluene:ethyl acetate=1:1) to give (2S,4R)-1-p-methoxybenzyloxycarbonyl-4-methanesulfonyloxypyrrolidine-2-methanol p-toluenesulfonate (11.75 g). Yield: 95%. NMR δ(CDCl3) ppm: 2.2 to 2.5(m), 2.44(s, 3H), 2.98(s, 3H), 3.4 to 3.6(m, 2H), 3.82(s, 3H), 3.8 to 4.6(m), 5.03, 4.95(ABq, J=12 Hz, 2H), 5.2 (br s, 1H), 6.89(d, J=8.6 Hz, 2H), 7.18 to 7.4(m, 4H), 7.6 to 7.8(m, 2H). IR ν (CHCl3) cm-1 : 1698, 1612.

Provenance & Evidence