反应详情

Ethyl 4-[(cyclopropylmethyl)oxy]cyclohexanecarboxylate (D99, 20.8 g, 45.8 mmol) was taken up in THF (50 mL)/methanol (50 mL). Sodium hydroxide (20 mL, 250 mmol, concentrated) was added to the solution which was left to stir o/n. The THF/methanol was evaporated and the crude residue washed with Et2O. The aqueous layer was acidified with 5 M HCl and extracted with EtOAc (2×). The EtOAc organics were combined, dried (Na2SO4) and the solvent evaporated to give a mixture of cis and trans 4-[(cyclopropylmethyl)oxy]cyclohexanecarboxylic acid (D100, 9.47 g, 94%) as a yellow oil.

1. waitwas left
2. customThe THF/methanol was evaporated
3. washthe crude residue washed with Et2O
4. extractionextracted with EtOAc (2×)
5. dry with materialdried (Na2SO4)
6. customthe solvent evaporated
7. customto give