Potassium Phosphate, Tribasic → (4'-{1-Ethyl-1-[4-(2-hydroxy-3,3-dimethyl-butoxy)-3-methyl-phenyl]-propyl}-2'-methyl-biphenyl-4-yl)acetic acid methyl ester

温度

100 °C

(4-Bromo-phenyl)acetic acid methyl ester (Tetrahedron Letters 44 (2003) 331-334; 35 mg, 0.152 mmol), palladium acetate (2.2 mg, 0.010 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl (8.2 mg, 0.020 mmol), potassium phosphate (64 mg, 0.303 mmol) and water (0.2 mL) were added to a solution of 1-(4-{1-ethyl-1-[3-methyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-propyl}-2-methyl-phenoxy)-3,3-dimethyl-butan-2-ol (Example 31; 50 mg, 0.101 mmol) in toluene (2 mL). After replacement with nitrogen, the mixture was stirred at 100° C. for 2.5 hours. The reaction mixture was then poured into a saturated aqueous sodium bicarbonate solution, followed by extraction with dichloromethane. The organic layer was dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=4:1) to give the target compound as a colorless oil (50.7 mg, 99%).

1. extractionfollowed by extraction with dichloromethane
2. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=4:1)

ORDレコード

ord-c720cc13b87c46548a68c4f82569e1fb

出典データセット

uspto-grants-2011_05

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07935688B2