methyl 3-bromo-4-(pyrrolidin-1-ylmethyl)benzoate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Methyl 3-bromo-4-bromomethylbenzoate (0.61 g; 2.0 mmol) (Part A) was dissolved in THF (10 mL) and pyrrolidine (0.66 mL; 7.9 mmol) was added at room temperature. The mixture was stirred overnight at room temperature, then poured into 80 mL of saturated aqueous aqueous sodium bicarbonate. Extraction was carried out with EtOAc (3×35 mL). The combined organics were washed with brine and dried by passage through sodium sulfate. The product was isolated as a colorless oil (0.46 g; 80% yield) by flash chromatography on silica gel eluting with EtOAc. Extraction The combined organics were washed with brine dried by passage through sodium sulfate The product was isolated as a colorless oil (0.46 g; 80% yield) by flash chromatography on silica gel eluting with EtOAc

反応条件: temp:137.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of methyl 3-bromo-4-[(1-pyrrolidinyl)methyl]benzoate (16 g, 53.7 mmol) in 110 mL of toluene was treated with Pd(PPh3)4 (3.1 g, 2.68 mmol) and tetramethyltin (22.3 mL, 161.1 mmol). The resulting mixture was heated at 135-140° C. for 36 hr in a sealed tube. After cooling to ambient temperature, the reaction mixture was filtered through diatomaceous earth and concentrated in vacuo. The crude brown residue was purified by PrepLC (SiO2; 97:2:1 hexanes-THF-TEA) to afford 11.4 g (48.9 mmol; 91%) of the title compound as a slightly yellow oil. After cooling to ambient temperature the reaction mixture was filtered through diatomaceous earth concentrated in vacuo The crude brown residue was purified by PrepLC (SiO2; 97:2:1 hexanes-THF-TEA)