反应详情

The hydrolysis conditions described for 191 were employed. Thus, ethyl 4-({4-[cycloheptylidene(4-hydroxyphenyl)methyl]phenyl}oxy)butanoate (217) (0.155 g, 0.39 mmol) was dissolved in THF and EtOH (1:1, 10 mL) and then treated with 1 N NaOH (2 ml) at 70° C. for 1 h. Upon acidification, work-up, and purification afforded 0.110 g (74%) of the title compound 218. 1H NMR (300 MHz, CD3OD): δ 7.02 (d, J=8.4 Hz, 2H), 6.94 (d, J=8.4 Hz, 2H), 6.83 (d, J=8.4 Hz, 2H), 6.69 (d, J=8.1 Hz, 2H), 4.00 (t, J=6.3 Hz, 2H), 2.49 (t, J=7.5 Hz, 2H), 2.31 (br s, 4H), 2.05 (quintet, J1=13.5 Hz, J2=6.9 Hz, 2H), 1.60 (s, 8H). LCMS (ESI): m/z 379 (M−H)−. Anal. Calcd for C24H28O4, C, 75.76; H, 7.42; Found: C, 75.81; H, 7.64.

1. customThe hydrolysis conditions
2. customUpon acidification, work-up, and purification