反应详情

温度

50 °C

To a solution of sodium methoxide (6.32 mg, 0.117 mmol) in anhydrous MeOH (346 mL), 5,5-dimethyl-tetrahydro-pyran-2-one (150 mg, 1.17 mmol) is added dropwise at room temperature under nitrogen. The mixture is stirred at 50° C. for 4 hours and filtered through a silica gel short column (eluent: diethyl ether). The filtrate is concentrated under reduced pressure to give 5-hydroxy-4,4-dimethyl-pentanoic acid methyl ester (175 mg, 93%); TLC (hexane/AcOEt, 2:1) Rf 0.27, 1H NMR (400 MHz, chloroform-d) δ ppm 0.89 (s, 6H), 1.63 (m, 2H), 2.32 (m, 2H), 3.28 (d, 2H), 3.68 (s, 3H).

1. filtrationfiltered through a silica gel short column (eluent: diethyl ether)
2. concentrationThe filtrate is concentrated under reduced pressure