反应详情

温度

20 °C

To a nitrogen-degassed mixture of 6-chloro-3,3-dimethyl-2,3-dihydro-pyrrolo[3,2-c]pyridine-1-carboxylic acid tert-butyl ester (1.12 g, 4 mmol), lithium bromide (1.39 g, 16 mmol), (1,3-diisopropylimidazol-2-ylidene)(3-chloropyridyl)palladium (II) dichloride (0.056 g, 0.08 mmol), 1-methyl-2-pyrrolidinone (10 mL) and THF (10 mL) was added a solution of benzylzinc bromide in THF (0.5 M, 32 mL) and resulting mixture was stirred at 20° C. for 24 h. The mixture was poured into water (100 mL) and 5% aqueous citric acid (30 mL) and the resulting mixture extracted with 1:1 EtOAc-petrol. The organic phase was washed with water (3×50 mL), dried (Na2SO4) and evaporated in vacuo to give an oil. Chromatography (SiO2, eluted with petrol-Et2O 0-80%) gave the title compound (1.1 g) as an oil. 1H NMR (CDCl3): 8.20 (1H, s), 7.32 (4H, d), 7.27-7.03 (2H, m), 4.13 (2H, s), 3.71 (2H, s), 1.51 (9H, s), 1.37 (6H, s).

1. customTo a nitrogen-degassed
2. customresulting mixture
3. extractionthe resulting mixture extracted with 1:1 EtOAc-petrol
4. washThe organic phase was washed with water (3×50 mL)
5. dry with materialdried (Na2SO4)
6. customevaporated in vacuo
7. customto give an oil
8. washChromatography (SiO2, eluted with petrol-Et2O 0-80%)