1-Hydroxybenzotriazole → (E)-N-methyl-N-(1-methylindol-5-ylmethyl)-3-(4-methyl-2-oxo-2,3,4,5-tetrahydro-1H-pyrido[2,3-e][1,4]diazepin-7-yl)acrylamide

Beteiligte Stoffe

Reaktionsschritte

To a solution of (methyl-(1-methyl-1H-indol-5-ylmethyl)amine (103 mg, 0.6 mmol), (E)-3-(4-methyl-2-oxo-2,3,4,5-tetrahydro-1H-pyrido[2,3-e][1,4]diazepin-7-yl)acrylic acid dihydrochloride (160 mg, 0.5 mmol), HOBt (81 mg, 0.5 mmol) and diisopropylethylamine (0.41 mL, 2 mmol) in DMF (12 mL) was added EDC hydrochloride (114 mg, 0.6 mmol). The mixture was stirred overnight at room temperature. Water (75 mL) was added and the solution stirred for 1 hr. The precipitate was collected by filtration. The yellow solid was preabsorded onto silica gel and purified by column chromatography (95:5 CH2Cl2/MeOH) to give a yellow oil. Diethyl ether (100 mL) was added and the mixture was sonicated. The ether layer was decanted to afford (E)-N-methyl-N-(1-methylindol-5-ylmethyl)-3-(4-methyl-2-oxo-2,3,4,5-tetrahydro-1H-pyrido[2,3-e][1,4]diazepin-7-yl)acrylamide (158 mg, 78%) as a white solid and as a mixture of amide rotomers. 1H NMR (300 MHz, DMSO-d6) δ 10.33 (d, J=4.3 Hz, 1H), 8.51 (d, J=6.1 Hz, 1H), 8.13 (s, 1H), 7.59-7.25 (m, 5H), 7.09-7.02 (m, 1H), 6.37 (s 1H), 4.67-4.86 (2×s, 2H), 3.72-3.79 (m, 5H), 3.42-3.38 (m, 2H), 3.06-2.87 (2×s, 3H), 2.37-2.33 (2×s, 3H); ESI MS m/z 404 [C23H25N5O2+H]+.

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