Ethyl isocyanate → N-(2-chlorophenyl)-8-(3-ethylureido)-N-methyl-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-2-carboxamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 8-amino-N-(2-chlorophenyl)-N-methyl-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-2-carboxamide HCl salt (0.25 g, 0.593 mmol) in anhydrous THF (15 mL) was added DIPEA (0.52 mL, 2.97 mmol) and ethyl isocyanate (0.1 g, 1.4 mmol). The solution was stirred at 40° C. overnight. The reaction mixture was poured into ammonium chloride aqueous solution and extracted with EtOAc. The organic phase was washed with brine and dried over anhydrous Na2SO4. After filtration, the filtrate was concentrated to the crude product, which was purified by preparative TLC to afford about 0.113 g of 166 (isolated yield: 42%). 1H NMR (DMSO-d6, 400 MHz): δ 8.56 (s, 1H), 7.64-7.58 (m, 2H), 7.49 (t, J=3.6 Hz, 2H), 7.22 (d, J=4.4 Hz, 1H), 7.15 (d, J=2.4 Hz, 1H), 6.92 (dd, J=2.0, 8.4 Hz, 1H), 6.44 (s, 1H), 6.13 (t, J=5.6 Hz, 1H), 4.09 (d, J=4.4 Hz, 2H), 3.22 (s, 3H), 3.06 (dd, J=6.0, 7.2 Hz, 2H), 2.85 (s, 2H), 1.01 (t, J=7.2 Hz, 3H). MS: (ESI+) 456.1

Provenance & Evidence