Potassium Hydroxide → 8-bromo-2-(2-(quinolin-2-yl)ethyl)-[1,2,4]triazolo[4,3-a]pridin-3(2H)-one

Participants

Reaction Conditions

Reaction Steps

2-Vinylquinoline (1-2) (218 mg, 1.40 mmol) and triazolopyridinone 1-5 (250 mg, 1.17 mmol) were placed in a microwave vial and dissolved in NMP (3 mL). To the mixture was added catalytic powdered KOH (13 mg, 0.234 mmol), and the vial was capped and heated at 160° C. under microwave irradiation for 20 min. After cooling, the mixture was diluted with CH2Cl2 (100 mL) and washed with water (25 mL) and brine (25 mL). The organic layer was dried over MgSO4, filtered, and concentrated in vacuo. The crude material was purified by silica gel flash column chromatography (40 g cartridge), eluting with 20-100% EtOAc/hexanes. The fractions containing the desired product (1-6) were pooled, and after solvent removal in vacuo, 240 mg (52%) of a fluffy yellow solid were obtained. 1H NMR (300 MHz, CHCl3-d) δ 8.07 (d, J=8.4 Hz, 1H), 8.02 (d, J=8.5 Hz, 1H), 7.77 (app t, J=8.0 Hz, 2H), 7.68 (t, J=7.7 Hz, 1H), 7.50 (t, J=7.5 Hz, 1H), 7.38-7.30 (m, 2H), 6.39 (dd, J=7.2, 6.7 Hz, 1H), 4.61 (t, J=7.6 Hz, 2H), 3.57 (t, J=7.6 Hz, 2H); HRMS (ES) 369.0345 (M+H) found, 369.0349 required.

Provenance & Evidence