反应详情

0.15 g of 4-bromo-2-chlorophenol, 0.18 g of sodium hydrogen carbonate, 0.6 mL of ethanol, 0.3 mL of water and 42 mg of tetrakis(triphenylphosphine) palladium(0) were added to 2.1 mL of toluene solution containing 0.37 g of tert-butyl 2-(benzamido)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate at room temperature, and the resulting mixture was heated to reflux for 4 hours. Toluene and a saturated sodium hydrogen carbonate aqueous solution were added after the reaction mixture was cooled to room temperature. The organic layer was separated and ethyl acetate was added after washed with a saturated sodium chloride aqueous solution and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. Hexane was added to the obtained residue and a solid substance was separated by filtration to obtain tert-butyl 2-(benzamido)-4-(3-chloro-4-hydroxyphenyl)benzoate.

1. temperaturethe resulting mixture was heated
2. temperatureto reflux for 4 hours
3. customThe organic layer was separated
4. additionethyl acetate was added
5. washafter washed with a saturated sodium chloride aqueous solution
6. dry with materialdried over anhydrous magnesium sulfate
7. customthe solvent was evaporated under reduced pressure
8. additionHexane was added to the obtained residue
9. customa solid substance was separated by filtration