Sodium hydride → 6-(4-Bromo-2-fluoro-phenyl)-8-cyclopropanesulfonyl-4,5-difluoro-2-methyl-6,8-dihydro-imidazo [4',5':3,4]benzo[1,2-d]oxazol-7-one

Participants

Reaction Steps

Intermediate I-26a was prepared from 6-(4-bromo-2-fluoro-phenyl)-4,5-difluoro-2-methyl-6,8-dihydro-imidazo[4′,5′:3,4]benzo[1,2-d]oxazol-7-one (I-17a: 200 mg, 0.52 mmol), cyclopropanesulfonyl chloride (111 mg, 0.781 mmol) and NaH (31.2 mg, 0.781 mmol) using procedures analogous to those described above for Intermediate I-19a to afford 110 mg of the product (42.1% yield). H1NMR (CDCl3, 300 MHz): δ 7.52-7.39 (m, 3H), 3.35-3.24 (m, 1H), 2.72 (s, 3H), 1.75-1.60 (m, 2H), 1.35-1.25 (m, 2H).

Provenance & Evidence