反应详情

4-Fluoro-3-nitro-phenylazide (7.5 mg, 0.041 mmol) and TBTA (1 mg, 0.001 mmol) were added to a solution of compound 211 (13.5 mg, 0.029 mmol) in CH2Cl2-t-butanol (0.6 mL)-water (0.6 mL) at room temperature. Freshly prepared 1M solution of sodium ascorbate (29.2 μL) followed by 7.5% solution of copper sulfate (48 μL, 0.015 mmol) was also added into the reaction mixture stirred at room temperature overnight. Solvent was evaporated, and the residue was purified on flash silica gel column chromatography (CH2Cl2:MeOH=45:1) to give compound 214 (17 mg, 91%) as a syrup. 1H NMR (CD3OD, 400 MHz) δ 861-8.59 (m, 1H), 8.49 (s, 1H), 8.23-8.19 (m, 1H), 8.14 (s, 1H), 7.65 (t, J=9.2 Hz, 1H), 7.39 (s, 1H), 7.33-7.24 (m, 3H), 4.79 (s, 1H), 4.72-4.70 (m, 3H), 3.90 (d, J=6.4 Hz, 1H), 2.99 (t, J=7.6 Hz, 2H), 2.53 (t, J=6.8 Hz, 2H), 2.08-1.96 (m, 3H), 1.69-1.65 (m, 1H), 1.33-1.30 (m, 1H), 0.79-0.75 (m, 1H). HRMS calculated for C31H28ClFN9O4 (M+H)+: 644.1937. Found 644.1962.

1. additionwas also added into the reaction mixture
2. customSolvent was evaporated
3. customthe residue was purified on flash silica gel column chromatography (CH2Cl2:MeOH=45:1)