反应详情

(rac)-rel-{(3aR,4R,6R,6aS)-2,2-dimethyl-6-[(2-{3-[(trimethylsilyl)ethynyl]phenyl}pyrazolo[1,5-a]pyrimidin-7-yl)amino]tetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl}methanol (0.067 g, 0.00014 mol; synthesized following Step 1 in Method A except using 4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenylethynyl-trimethylsilane instead of 1-naphthaleneboronic acid) is dissolved in methanol (0.03 mL, 0.0007 mol). Potassium carbonate (21 mg, 0.00015 mol) is added and the solution is stirred at room temperature overnight. The reaction mixture is neutralized with saturated ammonium chloride solution and extracted with dichlormethane. The organic layer is concentrated in vacuo and purified by column chromatography (0-15% MeOH/CH2Cl2) to provide (rac)-rel-[(3aR,4R,6R,6aS)-6-{[2-(3-ethynylphenyl)pyrazolo[1,5-a]pyrimidin-7-yl]amino}-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methanol (0.046 g, yield 81%). LCMS: (AA) M+ 405; 1H NMR (400 MHz, DMSO) δ 8.25-8.05 (m, 4H), 7.52-7.44 (m, 2H), 7.00 (s, 1H), 6.25 (d, J=5.4 Hz, 1H), 5.25-5.17 (m, 1H), 4.59-4.48 (m, 2H), 4.27 (s, 1H), 4.16-3.99 (m, 1H), 3.65-3.44 (m, 2H), 2.48-2.38 (m, 1H), 2.28-2.19 (m, 1H), 1.87-1.72 (m, 1H), 1.46 (s, 3H), 1.24 (s, 3H).

1. extractionextracted with dichlormethane
2. concentrationThe organic layer is concentrated in vacuo
3. custompurified by column chromatography (0-15% MeOH/CH2Cl2)