反应详情

Intermediate I-24a was prepared from 6-(4-bromo-2-fluoro-phenyl)-4,5-difluoro-6,8-dihydro-imidazo[4′,5′:3,4]benzo[1,2-d]oxazol-7-one (I-16a: 350 mg, 0911 mmol), N,N-dimethylaminosulfonyl chloride (196.32 mg, 1.36 mmol) and NaH (54.4 mg, 1.36 mmol) using procedures analogous to those described above for Intermediate I-19a to afford 65 mg of the product (14.5% yield). H1NMR (DMSO-d6, 300 MHz): δ 8.96 (s, 1H), 7.95 (dd, 1H), 7.79 (t, 1H), 7.69 (dd, 1H), 3.08 (s, 6H). HPLC: 95.7%