反应详情

The amine from Example 13A was dissolved in 1 M pH4 MeOH buffer (82 g NaOAc/L MeOH, add HOAc to pH 4.5) and acetone (12 mg, 0.2 mmol) and NaBH3CN (13 mg, 0.2 mmol) were added. Following stirring for 2 hours ethyl acetate (30 mL) was added and the resulting solution was washed with aqueous NaOH (1N, 2×10 mL). The organic phase was dried over MgSO4, concentrated, and purified by HPLC to provide the titled compound (30 mg, 23% over 3 steps). 1H NMR (300 MHz, DMSO-D6) δ 9.21 (s, 1H), 7.83 (s, 1H), 7.32 (d, J=9.3 Hz, 2H), 7.10 (m, 4H), 6.61 (d, J=9.0 Hz, 2H), 3.28 (q, J=6.9 Hz, 4H), 3.22 (d, J=18.9 Hz, 1H), 3.11 (d, J=18.9 Hz, 1H), 3.07 (s, 2H), 2.77 (m, 2H), 2.45 (m, 2H), 2.09 (m, 1H), 1.05 (t, J=7.2 Hz, 6H), 0.81 (d, J=6.3 Hz, 3H), 0.73 (d, J=6.3 Hz, 6H). MS (ESI) positive ion 437 (M+H)+; negative ion 435 (M−H)−.

1. additionwas added
2. washthe resulting solution was washed with aqueous NaOH (1N, 2×10 mL)
3. dry with materialThe organic phase was dried over MgSO4
4. concentrationconcentrated
5. custompurified by HPLC