Diisopropylethylamine → (R)-(E)-N-Methyl-N-(3-methylbenzofuran-2-ylmethyl)-3-(10-oxo-2,3,4,9,10,10a-hexahydro-1H-3a,8,9-triazabenzo[f]azulen-6-yl)acrylamide

Participants

Reaction Steps

A solution of methyl-(3-methylbenzofuran-2-ylmethyl)amine (0.166 g, 0.953 mmol) and diisopropylethylamine (0.45 mL, 2.59 mmol) in DMF (20 mL) under N2 was treated sequentially with (R)-6-bromo-1,2,3,4,9,10a-hexahydro-3a,8,9-triazabenzo[f]azulen-10-one (0.300 g, 0.866 mmol), 1-hydroxybenzotriazole hydrate (0.128 g, 0.953 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.182 g, 0.953 mmol). After stirring for 18 h, the reaction mixture was diluted with H2O (30 mL). The resulting solids were collected by filtration, washed with Et2O and dried to give the title compound (0.93 g, 31%) as a white solid and as a mixture of amide rotamers: 1H NMR (300 MHz, DMSO-d6) δ 10.38 (s, 1H), 8.59-8.56 (m, 1H), 8.23-8.21 (m, 1H), 7.58-7.21 (m, 6H), 5.00-4.79 (m, 2H), 3.96-3.92 (m, 1H), 3.55-3.47 (m, 2H), 3.19-2.84 (m, 4H), 2.61-2.59 (m, 1H), 2.26 (m, 4H), 1.76-1.74 (m, 3H).

Provenance & Evidence