Hydrochloric Acid → 2,2-Dimethyl 4-{4'-[(6-methyl-1,3-benzoxazol-2-yl)amino]-1,1'-biphenyl-4-yl}4-oxobutanoic acid

온도

85 °C

To a solution of methyl 4-(4′-amino-1,1′-biphenyl-4-yl)-2,2-dimethyl-4-oxobutanoate (74 mg, 0.24 mmol) in dichloroethane (3 mL), 6-methyl-2-(methylsulfonyl)-1,3-benzoxazole (50 mg, 0.24 mmol) was added, and the mixture was heated at 85° C. overnight. The solvent was removed by rotary evaporation, and the residue was redissolved in DMF (5 mL). A solution of 1 N aqueous NaOH (0.72 mL, 0.72 mmol) was added, and the mixture was heated at 65° C. overnight. A solution of 1 N aqueous HCl (0.24 mL, 0.24 mmol) and methanol (5 mL) were added to the reaction mixture and the crude product was purified by preparative reverse-phase HPLC (water/acetonitrile gradient, containing 0.1% TFA) to afford 2,2-dimethyl-4-{4′-[(6-methyl-1,3-benzoxazol-2-yl)amino]-1,1′-biphenyl-4-yl}-4-oxobutanoic acid as a white solid (32.6 mg, 32.1%). 1H NMR (300 MHz, DMSO-d6) δ 8.00-7.50 (m, 8 H), 7.30 (d, 2 H), 7.05 (d, 1 H), 3.30 (s, 2 H), 2.50 (s, 3 H), 1.10 (s, 6 H); LC-MS ret. time 3.53 min (method 2), m/z 429.17 (MH+).

1. customThe solvent was removed by rotary evaporation
2. dissolutionthe residue was redissolved in DMF (5 mL)
3. temperaturethe mixture was heated at 65° C. overnight
4. customthe crude product was purified by preparative reverse-phase HPLC (water/acetonitrile gradient, containing 0.1% TFA)

ORD 기록

ord-607c4058c66646c9a0c0dfd6199d876f

출처 데이터셋

uspto-grants-2011_06

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US07968576B2