反应详情

温度

140 °C

To a solution of (R)-3-amino-2-methylbutan-2-ol (made in a manner similar to Example 21G using commercially available (S)-methyl 2-aminopropanoate, hydrochloride) (0.1084 g, 1.051 mmol) and 2-chloro-4-fluoro-3-((trimethylsilyl)ethynyl)benzonitrile (Example 32B) (0.212 g, 0.841 mmol) in anhyd NMP (4 mL) at rt was added DBU (0.475 mL, 3.15 mmol), dropwise via syringe. The reaction vial was sealed with a crimp top and subjected to microwave heating (140° C.) for 40 min. Upon cooling the mixture was poured into satd NaHCO3 and extracted with EtOAc (×3). Combined organics were washed (water, brine), dried over Na2SO4 and concentrated in vacuo. The residue was purified by preparative HPLC (C18 stationary phase, MeCN/water gradient with 0.1% TFA additive) affording (R)-4-chloro-1-(3-hydroxy-3-methylbutan-2-yl)-1H-indole-5-carbonitrile (0.0188 g, 7% yield) as a tan film: 1H NMR (400 MHz, CDCl3) δ 7.50 (d, J=3.4 Hz, 1H), 7.41 (d, J=8.6 Hz, 1H), 7.37 (d, J=8.6 Hz, 1H), 6.74 (d, J=3.3 Hz, 1H), 4.41 (q, J=7.0 Hz, 1H), 1.60 (d, J=7.0 Hz, 3H), 1.33 (s, 3H), 1.10 (s, 3H); MS (LCMS ES+) m/z 263 ([M+H]+, 52%), 304 ({[M+H]+MeCN}+, 100%).

1. customat rt
2. customThe reaction
3. customvial was sealed with a crimp top
4. temperatureUpon cooling the mixture
5. extractionextracted with EtOAc (×3)
6. washCombined organics were washed (water, brine)
7. dry with materialdried over Na2SO4
8. concentrationconcentrated in vacuo
9. customThe residue was purified by preparative HPLC (C18 stationary phase, MeCN/water gradient with 0.1% TFA additive)