反应详情

温度

-78 °C

A −78° C. solution of benzyl 3-oxocyclobutanecarboxylate (11.05 g, 54.1 mmol) in THF (155 mL) was treated drop-wise with methyl magnesium bromide (3M in Et2O, 27.1 mL, 81 mmol) and the mixture stirred at −78° C. for 30 min. Saturated NH4Cl was added, the mixture extracted with EtOAc (2×) and the combined organic extracts were dried, evaporated and purified via silica gel chromatography (acetone/Hex) to afford benzyl 3-hydroxy-3-methylcyclobutanecarboxylate (5.589 g, 47%) as a colorless oil. 1H NMR (400 MHz, DMSO-d6): δ 7.36-7.29 (m, 5H); 5.08 (m, 3H); 2.75-2.66 (m, 1H); 2.13-2.12 (m, 4H); 1.21 (s, 3H); MS (ESI) m/z: 243.1 (M+Na+).

1. extractionthe mixture extracted with EtOAc (2×)
2. customthe combined organic extracts were dried
3. customevaporated
4. custompurified via silica gel chromatography (acetone/Hex)