Ethanol → 4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-ethoxybenzonitrile

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Reaction Conditions

Reaction Steps

A solution of 3-bromo-4-(6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)benzonitrile (0.090 g, 0.312 mmol) given in Example 3 (table 2), Pd2(dba)3 (0.029 g, 0.031 mmol), BINAP (0.039 g, 0.062 mmol), Cs2CO3 (0.204 g, 0.625 mmol), EtOH (0.091 mL, 1.54 mmol), and DME (4 mL) is heated in a microwave reactor at 135° C. for 1.5 h. At that point LCMS showed consumption of the starting material. The mixture is filtered and then the filtrate is concentrated. The residue is then purified by flash chromatography (0-10% MeOH/DCM) give 4-(6,7-Dihydro-5H-pyrrolo[1,2-c]imidazol-5-yl)-3-ethoxybenzonitrile. MS (ESI) m/z 254.1 (M+H); 1H NMR (400 MHz, MeOD) (TFA salt) δ ppm 1.32 (t, J=6.9 Hz, 3H), 2.69-2.82 (m, 1H), 3.07-3.22 (m, 3H), 4.02-4.22 (m, 2H), 5.92-6.03 (m, 1H), 7.27 (d, J=7.8 Hz, 1H), 7.31 (s, 1H), 7.36 (dd, J=7.8, 1.5 Hz, 1H), 7.43 (d, J=1.3 Hz, 1H), 8.68 (s, 1H).

Provenance & Evidence