Diisopropylethylamine → [1-(1-Phenyl-1H-imidazo[4,5-b]pyridin-2-yl)-ethyl]-(9H-purin-6-yl)-amine

Participants

Reaction Conditions

Reaction Steps

A mixture of (S)-1-(1-phenyl-1H-imidazo[4,5-b]pyridin-2-yl)ethylamine (330 mg, 1.38 mmol), 6-chloro-9-(tetrahydropyran-2-yl)-9H-purine (460 mg, 1.94 mmol) and DIPEA (440 μL, 2.49 mmol) in n-butanol (2 mL) was heated at 90° C. in a sealed vial for 16 h. After cooling to RT, the volatiles were removed under reduced pressure and the resulting residue loaded onto an Isolute® SCX-2 cartridge and washed with MeOH followed by 2M NH3/MeOH. The product containing fractions were combined and concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, gradient 0-15% 2M NH3/MeOH in DCM) and then crystallised from EtOAc and MeOH to afford 199 as a white solid (178 mg, 36%). LCMS (Method K): RT 2.72 min [M+H]+ 357.0. 1H NMR (DMSO-d6, 400 MHz): δ 8.42 (1H, dd, J=4.73, 1.53 Hz), 8.20-7.94 (3H, m), 7.68 (2H, d, J=7.55 Hz), 7.63-7.48 (4H, m), 7.23 (1H, dd, J=8.06, 4.74 Hz), 5.51 (1H, br s), 1.60 (3H, d, J=6.85 Hz)

Provenance & Evidence