反应详情

A mixture of 2-(2-methylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde (0.075 g, 0.20 mmol), 2-azetidin-3-ylpropan-2-ol (0.023 g, 0.20 mmol) in DCE (2 mL), trimethoxymethane (0.215 mL, 2 mmol) and acetic acid (0.012 mL, 0.2 mmol) was stirred for 1 h at room temperature. Sodium triacetoxyborohydride (0.042 g, 0.2 mmol) was added and the reaction mixture was stirred for 18 h at room temperature. The reaction mixture was partitioned between DCM and water, and the organic layer was separated, washed with brine, dried over sodium sulphate and concentrated. The residue was purified by flash chromatography (Si—PPC, MEOH:DCM, gradient 0:100 to 10:90) to give 315 as an off-white solid (0.020 g, 23%). LCMS (Method G): RT=5.61 min, [M+H]+ 477.2. 1H NMR (CDCl3, 400 MHz) δ 8.11-8.07 (m, 1 H); 7.72-7.69 (m, 1 H); 7.35-7.26 (m, 2 H); 4.42-4.31 (m, 4 H); 3.89-3.82 (m, 11 H); 3.62-3.12 (m, 2 H); 2.94 (s, 3 H); 2.70-2.55 (m, 1H); 1.18 (s, 6 H)

1. stirringthe reaction mixture was stirred for 18 h at room temperature
2. customThe reaction mixture was partitioned between DCM and water
3. customthe organic layer was separated
4. washwashed with brine
5. dry with materialdried over sodium sulphate
6. concentrationconcentrated
7. customThe residue was purified by flash chromatography (Si—PPC, MEOH:DCM, gradient 0:100 to 10:90)