2-Nitrobenzenesulfonyl chloride → HCID 117697629, compound

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A solution of 3-oxa-9-azabicyclo[3.3.1]nonan-7-one hydrochloride (CAS 1126795-00-3, 2.82 g), TEA (6.12 g, 60 mmol, 3.0 eq) and 2-Nitro-benzenesulfonyl chloride (8.84 g, 40 mmol, 2.0 eq) in DCM (100 mL) was stirred at room temperature for 10 h. Then the solvent was removed in vacuo, the residue was purified by silica gel (EA/PE=1:3) to give 9-(2-nitrophenyl)sulfonyl-3-oxa-9-azabicyclo[3.3.1]nonan-7-one 107b as a white solid, 4.90 g, yield: 75%. MS: calc'd (MH+) 327, measured (MH+) 327.

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