Sodium triacetoxyborohydride → 1-(1-((2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-6-morpholino-9H-purin-8-yl)methyl)azetidin-3-yl)piperidin-4-ol

Participants

Reaction Steps

A mixture of 2-(2-ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde (0.167 g, 0.43 mmol), 1-azetidin-3-ylpiperidin-4-ol (0.1 g, 0.64 mmol) and 4 Å molecular sieves (0.8 g) in DCE (8 mL) was stirred for 6 h at room temperature. Sodium triacetoxyborohydride (0.272 g, 1.28 mmol) was added and the reaction mixture was stirred for 18 h at room temperature. The reaction mixture was filtered through Celite and the filtrate was concentrated in vacuo. The residue was purified by flash chromatography (Si—PPC, MEOH:DCM, gradient 0:100 to 5:95) to give 486 as a yellow solid (0.123 g, 55%). LCMS (Method I): RT=2.31 min, [M+H]+ 532.3. 1H NMR (400 MHz, DMSO-d): δ 8.03-7.99 (m, 1 H); 7.65-7.61 (m, 1 H); 7.27-7.20 (m, 2 H); 4.54 (d, J=4.0 Hz, 1 H); 4.29-4.22 (m, 4 H); 3.86 (s, 2 H); 3.82-3.73 (m, 7 H); 3.42 (t, J=6.5 Hz, 2 H); 3.30-3.27 (m, 3 H); 3.27 (q, J=7.4 Hz, 2 H); 2.96 (t, J=6.5 Hz, 2 H); 2.89-2.86 (m, 1 H); 1.88-1.85 (m, 2 H); 1.71-1.68 (m, 2 H); 1.39-1.35 (m, 2 H); 1.33 (t, J=7.4 Hz, 3 H)

Provenance & Evidence