反应详情

温度

-78 °C

To a solution of N-chlorosuccinimide (8.02 g, 60.05 mmol) in dichloromethane (475 mL) at −78° C. was added zirconium(IV)chloride (2.80 g, 12.01 mmol), followed by 3-methyl-naphthalen-2-ol (4A) (9.5 g, 60.05 mmol) under Ar. The reaction mixture was stirred at −78° C. for minutes, the cooling bath was removed and the reaction was stirred at room temperature for 5 h. The reaction was quenched with saturated sodium bicarbonate solution and stirred for 5 minutes. The mixture was diluted with H2O, extracted with dichloromethane (3×) and the combined organic layer was dried (MgSO4), filtered, concentrated and purified by flash column chromatography (silica gel, 0 to 10% ethyl acetate/hexanes) to give 4B as a white solid (9.05 g, 78%).

1. customthe cooling bath was removed
2. stirringthe reaction was stirred at room temperature for 5 h
3. customThe reaction was quenched with saturated sodium bicarbonate solution
4. stirringstirred for 5 minutes
5. additionThe mixture was diluted with H2O
6. extractionextracted with dichloromethane (3×)
7. dry with materialthe combined organic layer was dried (MgSO4)
8. filtrationfiltered
9. concentrationconcentrated
10. custompurified by flash column chromatography (silica gel, 0 to 10% ethyl acetate/hexanes)