Sodium Dithionite → HCID 178488890, compound

Participants

Reaction Steps

This was prepared using the same procedure as for 4-(6-bromo-2-(4-(dimethylamino)phenyl)-3H-imidazo[4,5-b]pyridin-7-yl)-N-phenylpiperazine-1-carboxamide, but here using 5-chloro-3-nitro-4-(4-(1-(pyridin-4-yl)ethyl)piperazin-1-yl)pyridin-2-amine (19 mg, 0.052 mmol), DMF (0.15 mL), ethanol (0.85 mL), 1M Na2S2O4 (3 eq, 0.16 mmol, 0.16 mL) and 4-methoxybenzene carboxaldehyde (1.1 eq, 0.058 mmol, 8 mg). After 6 h, concentration in vacuo and purification by preparative tlc (CH2Cl2-MeOH, 95:5) gave the product (10 mg, 42%) as a colourless solid; δH (500 MHz, DMSO-d6) 1.35 (d, J=6.7 Hz, 3H, CHCH3), 2.52-2.55 (m, 2H, piperazine NCH2), 2.63-2.66 (m, 2H, piperazine NCH2), 3.58 (q, J=6.7 Hz, CHCH3), 3.68 (s, br, 4H, piperazine N(CH2)2), 3.84 (s, 3H, OCH3), 7.10 (d, J=8.9 Hz, 2H, methoxyphenyl H-2 & H-6), 7.39 (d, J=6.0 Hz, 2H, pyridine H-3 & H-5), 8.06 (s, 1H, imidazo[4,5-b]pyridine H-5), 8.11 (d, J=8.9 Hz, 2H, methoxyphenyl H-3 & H-5), 8.54 (d, J=6.0 Hz, 2H, pyridine H-2 & H-6), 13.30 (s, br, 1H, imidazo[4,5-b]pyridine NH);

Provenance & Evidence