4-Methoxybenzyl alcohol → HCID 10605273, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of chlorosulfonyl isocyanate (3.95 ml: 45.4 mmole) in dichloromethane (70 ml), p-methoxybenzyl alcohol (5.66 ml: 45.4 mmole) is added at -50° C. The mixture is stirred at -50° C. for 15 minutes. The resulting solution of p-methoxybenzyloxycarbonylsulfamoyl chloride is added to a solution of (2S,4S)-1-p-methoxybenzyloxycarbonyl-2-aminomethyl-4-tritylthiopyrrolidine (obtained in the above Steps 6 or 8) (12.21 g: 22.7 mmole) and triethylamine (6.38 ml: 45.6 mmole) in dichloromethane (300 ml) at -78° C., and the mixture is stirred for 10 minutes, successively washed with dilute hydrochloric acid and brine, and concentrated in vacuo. The residue is purified by silica gel column chromatography to give (2S,4S)-1-p-methoxybenzyloxycarbonyl-2-p-methoxybenzyloxycarbonylsulfamoylaminomethyl-4-tritylthiopyrrolidine (16.31 g). Yield: 91.6%. NMR δ(CDCl3) ppm: 3.78(s, 3H), 3.81, 3.83(2×s, 3H), 4.98, 4.89(ABq, J=12 Hz, 2H), 5.09, 5.03(ABq, J=12 Hz, 2H). IR ν (CHCl3) cm-1 : 3390, 1740, 1685.

Provenance & Evidence