反应详情

A mixture of methyl 7-amino-4H-5-oxa-3,9b-diazacyclopenta[a]naphthalene-6-carboxylate (Intermediate 26, 0.379 g) and 2-bromo-4-fluorobenzenesulfonyl chloride (0.466 g) in pyridine (10 mL) and DCM (10 mL) was stirred at room temperature for 17 hours. A further amount of 2-bromo-4-fluorobenzenesulfonyl chloride (0.190 g) was added and the mixture was stirred at room temperature for 5 hours. The resultant mixture was concentrated in vacuo and the residue was dissolved in DCM and water and passed through a phase separator. The filtrate was concentrated in vacuo and the residue was purified by chromatography on silica, eluting with ethyl acetate to give a white solid which was triturated with ether to give methyl 7-(2-bromo-4-fluorobenzenesulfonylamino)-4H-5-oxa-3,9b-diazacyclopenta[a]naphthalene-6-carboxylate (0.603 g) as an off-white solid.

1. stirringthe mixture was stirred at room temperature for 5 hours
2. concentrationThe resultant mixture was concentrated in vacuo
3. dissolutionthe residue was dissolved in DCM
4. concentrationThe filtrate was concentrated in vacuo
5. customthe residue was purified by chromatography on silica
6. washeluting with ethyl acetate
7. customto give a white solid which
8. customwas triturated with ether