反应详情

温度

110 °C

To a vial was added (R)-3-(6-chloro-2-methoxypyridin-3-yl)-3-methylpyrrolidin-2-one (56.6 mg, 0.24 mmol) which was evaporated with dioxane (2.0 mL). 1-methyl-1H-indol-5-ylboronic acid (63.4 mg, 0.36 mmol) was next added followed by Pd(dppf)Cl2 (7.5 mg, 0.01 mmol). The mixture was sealed and degassed with nitrogen. Degassed dioxane (1.9 mL) and degassed 2 M Na2CO3 (0.27 mL, 2.3 equiv) were then added to the solid mixture. The reaction was stirred for 16 h at 110° C. The reaction was concentrated and partitioned between EtOAc/10% (w/v) aq. Na2CO3. The organic layer was washed with brine, dried over Na2SO4, and concentrated to provide a crude brown glass. Purification by column chromatography (4 g RediSep Gold column) with a 40-100% EtOAc/heptane gradient provided the title compound (78 mg, 99%) as a pale yellow glass. 1H NMR (600 MHz, CDCl3) δ: 1.62 (s, 3H), 2.10 (ddd, 1H), 2.67-2.76 (m, 1H), 3.37-3.47 (m, 2H), 3.82 (s, 3H), 4.10-4.12 (m, 3H), 5.59 (br. s., 1H), 6.56 (d, 1H), 7.07 (d, 1H), 7.34-7.39 (m, 2H), 7.67 (d, 1H), 7.92-7.96 (m, 1H), 8.30 (s, 1H); MS (AP+)(M+H) 336. The absolute stereochemistry was obtained via X-ray crystallographic analysis of single crystals obtained via crystallization from a mixture of DCM and EtOH. FIG. 2 is an ORTEP drawing of (R)-3-(2-methoxy-6-(1-methyl-H-indol-5-yl)pyridin-3-yl)-3-methylpyrrolidin-2-one.

1. customwas evaporated with dioxane (2.0 mL)
2. additionnext added
3. customThe mixture was sealed
4. customdegassed with nitrogen
5. additionwere then added to the solid mixture
6. concentrationThe reaction was concentrated
7. custompartitioned between EtOAc/10% (w/v) aq. Na2CO3
8. washThe organic layer was washed with brine
9. dry with materialdried over Na2SO4
10. concentrationconcentrated
11. customto provide a crude brown glass
12. customPurification by column chromatography (4 g RediSep Gold column) with a 40-100% EtOAc/heptane gradient