Triethylamine → HCID 11463748, compound

Participants

Reaction Steps

To a stirred solution of 6-amino-4,4-dimethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one (0.05 g, 0.24 mmol) in methylene chloride (2 mL) at 0° C. was added triethylamine (0.05 mL, 0.36 mmol). After 10 minutes, 2,3-dichlorobenzenesulfonyl chloride (0.06 g, 0.24 mmol) was added. The solution was stirred for 2 hours, then partitioned between ammonium chloride solution (sat.) and methylene chloride. The organic layer was dried over magnesium sulfate and concentrated. Flash silica gel column separation with 50% ethyl acetate/hexane followed by trituration with ether gave 2,3-dichloro-N-(4,4-dimethyl-2-oxo-1,4-dihydro-2H-3,1-benzoxazin-6-yl)benzenesulfonamide as a white solid (0.008 g, 8%). 1H NMR (DMSO-d6): δ 10.57 (s, 1H), 10.16 (s, 1H), 7.97 (dd, J=7.9, 1.3 Hz, 1H), 7.92 (dd, J=8.0, 1.3 Hz, 1H), 7.53 (t, J=8.0 Hz, 1H), 6.93 (m, 2H), 6.74 (d, J=8.4 Hz, 1H), 1.46 (s, 6H). MS (ESI) m/z 401/403/405 ([M+H]+); MS (ESI) m/z 399/401/403 ([M−H]−).

Provenance & Evidence