HCID 22181416, compound → HCID 22181263, compound

Participants

Reaction Steps

To a solution of 3-(cyclopropylmethyl)-2-[(4-ethoxyphenyl)methyl]-6-nitro-3H-imidazo[4,5-b]pyridine (1.35 g, 3.84 mmol) in EtOAc (20 mL) and acetic acid (1 mL) at room temperature was added Pd/C (308 mg, 10% grade). The mixture was placed in a Parr apparatus under 35 psi H2. The mixture was shaken for 72 hours. The reaction was filtered over Celite. The filtrate was taken up into 1 M NaOH aqueous solution (25 mL) and EtOAc (50 mL) and the phases separated. The aqueous phase was back-extracted with additional EtOAc (2×50 mL). The organic phases were combined, dried with MgSO4, filtered and concentrated in vacuo. The process gave 1.18 g of the title compound 3-(cyclopropylmethyl)-2-[(4-ethoxyphenyl)methyl]-3H-imidazo[4,5-b]pyridin-6-amine (95% yield from 3-(cyclopropylmethyl)-2-[(4-ethoxyphenyl)methyl]-6-nitro-3H-imidazo[4,5-b]pyridine), with purity>95% by HPLC analysis. The residue was used without further purification. 1H-NMR (400 MHz, CDCl3): δ 0.35 (m, 2H), 0.46 (m, 2H), 1.11 (m, 1H), 1.39 (t, J=6.8 Hz, 3H), 3.26 (br s, 2H), 3.98 (m, 4H), 4.25 (s, 2H), 6.83 (d, J=8.8 Hz, 2H), 7.16 (d, J=8.8 Hz, 2H), 7.34 (d, J=2.3 Hz, 1H), 7.87 (d, J=2.3 Hz, 1H). MS (ESI) (M+H)+: 323.

Provenance & Evidence