反应详情

To a suspension of racemate 1G (323 mg, 1.03 mmol) in mixed solvents of MeOH (3 mL), CH2Cl2 (3 mL) and THF (3 mL) at RT was added CaCO3 (103 mg, 1.03 mmol), followed by benzyltriethylammonium tribromide (445 mg, 1.03 mmol). After addition, the mixture was stirred at RT for 45 min. The resultant precipitate was collected by filtration, washed with 0.2 N aqueous HCl, H2O, then dried to provide the title compound (311 mg, 77%) as a white solid.

1. additionAfter addition
2. filtrationThe resultant precipitate was collected by filtration
3. washwashed with 0.2 N aqueous HCl, H2O
4. customdried