反应详情

60% suspension mixed with NaH mineral oil (7.6 g, 0.19 mol) was added to trimethyl phosphonoacetate (22.8 mL, 0.15 mol) solution dissolved in anhydrous tetrahydrofuran (655 mL) under 0° C. nitrogen gas. 4-(4-hydroxyphenyl)cyclohexanone (25 g, 0.13 mol) solution dissolved in tetrahydrofuran (525 mL) was slowly added thereto at 25° C. Then, the reaction mixture was stirred at room temperature for 5 hours, cooled with water, and extracted with ethyl acetate. The mixed organic phase was washed with brine and dried with Na2SO4. The solvent was reduced under reduced pressure to obtain [4-(4-hydroxyphenyl)cyclohexylidene]acetic acid methyl ester as a white solid (31.3 g, 97%).

1. additionwas slowly added
2. customat 25° C
3. extractionextracted with ethyl acetate
4. washThe mixed organic phase was washed with brine
5. dry with materialdried with Na2SO4