9-Bromo-4,4-difluoro-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid methyl ester → (R)-methyl 4,4-difluoro-9-((3-hydroxy-1-methyl-2-oxopyrrolidin-3-yl)ethynyl)-4,5-dihydrobenzo[2,3]oxepino[4,5-d]thiazole-2-carboxylate

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Methyl 9-bromo-4,4-difluoro-4,5-dihydrobenzo[2,3]oxepino[4,5-d]thiazole-2-carboxylate was reacted with (3R)-3-ethynyl-3-hydroxy-1-methyl-pyrrolidin-2-one similarly to as described in General Procedure F with non-critical modifications to afford crude (R)-methyl 4,4-difluoro-9-((3-hydroxy-1-methyl-2-oxopyrrolidin-3-yl)ethynyl)-4,5-dihydrobenzo[2,3]oxepino[4,5-d]thiazole-2-carboxylate. Crude (R)-methyl 4,4-difluoro-9-((3-hydroxy-1-methyl-2-oxopyrrolidin-3-yl)ethynyl)-4,5-dihydrobenzo[2,3]oxepino[4,5-d]thiazole-2-carboxylate was subjected to General Procedure M to afford 21.2 mg (38%) of 4,4-difluoro-9-[2-[(3R)-3-hydroxy-1-methyl-2-oxo-pyrrolidin-3-yl]ethynyl]-5H-[1]benzoxepino[5,4-d]thiazole-2-carboxamide. M+1=420; 1H NMR (400 MHz, DMSO-d6) δ 8.73 (s, 1H), 8.63 (d, J=2.2 Hz, 1H), 8.15 (s, 1H), 7.49 (dd, J=8.4, 2.2 Hz, 1H), 7.24 (d, J=8.4 Hz, 1H), 6.43 (s, 1H), 4.76 (t, J=10.6 Hz, 2H), 3.43-3.29 (m, 2H), 2.81 (s, 2H), 2.46 (ddd, J=12.8, 6.4, 5.1 Hz, 1H), 2.26-2.15 (m, 1H).

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