反应详情

Thiomorpholine (0.14 mL), cesium carbonate (0.58 g), tris(dibenzylideneacetone)dipalladium(0) (8.2 mg), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (21 mg), and palladium(II) acetate (4.0 mg) were added to a toluene (5.0 mL) solution of tert-butyl 2-(2-(benzyloxy)-5-bromobenzamido)-4-phenylbenzoate (0.50 g), followed by heating to reflux under a nitrogen atmosphere for 2 hours. The reaction mixture was cooled to room temperature, and then thiomorpholine (0.045 mL), cesium carbonate (0.15 g), tris(dibenzylideneacetone)dipalladium(0) (8.2 mg), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (21 mg), and palladium(II) acetate (4.0 mg) were added thereto, followed by heating to reflux under a nitrogen atmosphere for 3 hours. The reaction mixture was cooled to room temperature, and then water and ethyl acetate were added thereto. The insoluble substance was removed by filtration. The organic layer was separated, washed with a 10% aqueous solution of citric acid and a saturated aqueous solution of sodium chloride sequentially, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography [Kanto Chemical Co., Inc., silica gel 60 (spherical), eluent: 100-80% hexane/ethyl acetate] to obtain 0.36 g of tert-butyl 2-(2-(benzyloxy)-5-(thiomorpholin-4-yl)benzamido)-4-phenylbenzoate as a yellow solid.

1. temperatureby heating
2. temperatureto reflux under a nitrogen atmosphere for 2 hours
3. temperatureby heating
4. temperatureto reflux under a nitrogen atmosphere for 3 hours
5. temperatureThe reaction mixture was cooled to room temperature
6. customThe insoluble substance was removed by filtration
7. customThe organic layer was separated
8. washwashed with a 10% aqueous solution of citric acid
9. dry with materiala saturated aqueous solution of sodium chloride sequentially, and dried over anhydrous magnesium sulfate
10. customthe solvent was evaporated under reduced pressure
11. customThe obtained residue was purified by silica gel column chromatography [Kanto Chemical Co., Inc., silica gel 60 (spherical), eluent: 100-80% hexane/ethyl acetate]