1,2-Dichloroethane → N-Methyl-N-(3-methyl-benzofuran-2-ylmethyl)-3-(5,7,8,9-tetrahydro-6-oxa-1,9-diaza-benzocyclohepten-3-yl)-acrylamide

Participants

Reaction Conditions

Reaction Steps

EDC (0.10 g, 0.52 mmol) was added to a solution of 3-(5,7,8,9-Tetrahydro-6-oxa-1,9-diaza-benzocyclohepten-3-yl)-acrylic acid hydrochloride (0.11 g, 0.43 mmol), HOBt (64 mg, 0.47 mmol), Methyl-(3-methyl-benzofuran-2-ylmethyl)-amine (91 mg, 0.52 mmol) and (i-Pr)2EtN (0.44 mL, 2.58 mmol) in DMF (6 mL). The mixture was allowed to stir overnight at 35° C. The mixture was cooled to 0° C. and diluted with H2O (15 mL) with rapid stirring. The resulting precipitate was filtered, washed with H2O (30 mL) then dried under high vacuum. The solid was triturated with Et2O (30 mL), stirred for 20 min then filtered to give a beige solid as a mixture of amide rotamers. Yield: 0.10 g (62%); 1H NMR (300 MHz, DMSO-d6) δ 8.25 (s, 1H), 7.94 (s, 1H), 7.59-7.03 (m, 6H), 6.79 (br s, 1H), 4.98 and 4.79 (2×s, 2H), 4.53 (s, 2H), 3.77-3.73 (m, 2H), 3.25-3.19 (m, 2H), 3.17 and 2.93 (2×s, 3H), 2.28 (s, 3H); ESI MS m/z 378 [C22H23N3O3+H]+

Provenance & Evidence