反应详情

To a solution of Compound 2 (0.73 g, 2.8 mmol) in anhydrous DMF (100 mL), sodium hydride (60% in mineral oil, 0.13 g, 3.3 mmol) was carefully added. The resulting mixture was stirred at room temperature for 30 min, until hydrogen evolution had ceased. The reaction mixture was slowly added to a solution of 1-bromo-3-chloropropane (0.52 g, 3.3 mmol) in anhydrous DMF (150 mL). The resulting mixture was stirred at room temperature for 12 h. The solvents were removed in vacuo to give a yellow solid (1.59 g). The residue was dissolved in acetone, filtered and the filtrate concentrated in vacuo, giving the title compound (1.07 g, 100%). 1H- and 13 C-NMR revealed that the crude product was a mixture of the bromo and chloro isomers in the ratio 70:8. The crude product was used without further purification.

1. customThe solvents were removed in vacuo