Sodium ethoxide → HCID 68752272, compound

Participants

Reaction Steps

To 0.469 g sodium ethanolate (6.89 mmol) dissolved in 20 ml ethanol was added 1.0 g 2-(4-bromophenyl)-5-(1H-pyrrol-2-yl)-1,3,4-oxadiazole (3.45 mmol) at room temperature under nitrogen and the mixture was stirred at room temperature for 5 minutes. The reaction was heated at 160° C. for 2 hours in a microwave (Biotage Initiator 2.5). The reaction was monitored by TLC dichloromethane/methanol=9/1. Additional equivalents of sodium ethanolate were added and additional heating was carried out until completion of the reaction according to TLC. The reaction mixture was concentrated under reduced pressure and adsorbed on silica gel. The product was purified by silica gel chromatography (gradient: cyclohexane/ethylacetate=0-100%) to afford the title compound. 1H NMR (400 MHz, DMSO-d6) δ 12.09 (s, 1H), 7.85-7.78 (m, 2H), 7.76-7.69 (m, 2H), 7.39 (dd, J=1.3, 2.9, 1H), 7.16 (dd, J=1.4, 3.8, 1H), 6.77 (dd, J=2.9, 3.8, 1H). 13C NMR (400 MHz, DMSO-d6) δ 154.22, 136.46, 131.98, 130.90, 129.52, 124.07, 124.00, 118.80, 114.42, 111.01.

Provenance & Evidence