Hydrogen Bromide → 2,2,4,6-Tetramethyl-5-[4-(4-methylphenyl)piperazin-1-yl]-2,3-dihydro-1-benzofuran-7-ol

온도

100 °C

To 1-(7-methoxy-2,2,4,6-tetramethyl-2,3-dihydro-1-benzofuran-5-yl)-4-(4-methylphenyl)piperazine (444 mg, 1.18 mmol) synthesized in Example 62, acetic acid (7 mL) and 48% aqueous solution of hydrobromic acid (7 ml) were added, followed by stirring at 100° C. for 12 hours. After cooling to room temperature, aqueous solution of saturated sodium hydrogen carbonate was added to the mixture solution, and then the mixture solution was extracted with ethyl acetate. The extract solution was dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate 100:0-90:10) and the resulting solids were recrystallized from hexane-ethyl acetate to obtain the title compound 71.0 mg (yield 16%). Melting point was 185 to 189° C.

1. temperatureAfter cooling to room temperature
2. extractionthe mixture solution was extracted with ethyl acetate
3. dry with materialThe extract solution was dried over anhydrous magnesium sulfate
4. customThe solvent was removed by distillation under reduced pressure
5. customThe resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate 100:0-90:10)
6. customthe resulting solids were recrystallized from hexane-ethyl acetate

ORD 기록

ord-4b08c483ba39488686e16d5c5514db33

출처 데이터셋

uspto-grants-2012_10

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US08288390B2