Sodium hydride → HCID 131717002, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred suspension of NaH (17.2 mmol of an 80% dispersion) in dry dimethylformamide (30 mL) at rt was added 5,7-dimethyl-2-ethylimidazo[4,5-b] pyridine (1.51 g, 8.62 mmol) in one portion. After 20 minutes, the mixture was cooled to 0° C. and N-triphenylmethyl-5-(4'-bromomethylbiphenyl-2-yl)tetrazole (5.29 g, 9.48 mmol) was added in one portion. The resulting mixture was warmed to rt and stirred for 15 hours. The excess NaH was quenched with water and the bulk of the DMF was removed in vacuo at 40°-50° C. The residue was extracted with EtOAc from brine, dried (K2CO3), and concentrated. Purification by flash chromatography (SiO2, solvent gradient: 80% EtOAc/hexanes, 100% EtOAc) gave 4.25 g of 5,7-dimethyl-2-ethyl-3-(2'-(N-triphenylmethyltetrazol-5-yl)biphen-4-yl)methyl-3H-imidazo[4.5-b]pyridine: 1H NMR (300 MHz, CDCl3) δ7.86 (dd, 1H, J=7, 2 Hz), 7.50-7.41 (m, 2H), 7.36-7.21 (m, 10 H), 7.05 (d, 2 H, J=4.5 Hz), 6.95-6.89 (m, 7 H), 6.86 (d, 2 , H, J=4.5 Hz), 5,35 (s, 2H), 2.67 (q, 2, H, J=7.5 Hz), 2.65 (s, 3 H), 2.58 (s, 3 H), 1.25 (t, 3 H, J=7.5 Hz).

Provenance & Evidence