Sulfuric Acid → 2-(4-(2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-6-morpholino-9H-purin-8-yl)piperidin-1-yl)-2-methylpropanamide

Participants

Reaction Steps

2-{4-[2-(2-Ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purin-8-yl]piperidin-1-yl}-2-methylpropionitrile (300 mg, 0.58 mmol) was added slowly to conc. H2SO4 (3.5 mL) The resulting mixture was allowed to stir at r.t. for 3 h then poured onto ice and basified with K2CO3. The resulting mixture was extracted with DCM and the combined organic phases dried (Na2SO4) and concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, MeOH:EtOAc, 0-20%) then loaded onto an Isolute® SCX-2 cartridge which was washed with MeOH and the product eluted with 2M NH3/MeOH affording 703 (177 mg, 57%). LCMS (method I): RT 2.45 min, [M+H]+ 532.3. 1H NMR (DMSO, 400 MHz): δ 8.01-7.97 (1 H, m), 7.63-7.62 (1 H, m), 7.23-7.22 (3 H, m), 6.93 (1 H, d, J=3.36 Hz), 4.26 (4 H, brd s), 3.79-3.74 (7 H, m), 3.26 (2 H, q, J=7.42 Hz), 3.07-2.97 (1 H, m), 2.88 (2 H, d, J=10.76 Hz), 2.32-2.21 (2 H, m), 1.93-1.91 (4 H, m), 1.33 (3 H, t, J=7.44 Hz), 1.12 (6 H, s)

Provenance & Evidence