C([C:3]1[C:11]([O:12][CH2:13][CH:14]2[CH2:19][CH2:18][CH2:17][CH2:16][CH2:15]2)=[CH:10][CH:9]=[CH:8][C:4]=1[C:5]([OH:7])=[O:6])C.[OH-].[Na+].Cl>C(O)C.C1COCC1>[CH:14]1([CH2:13][O:12][C:11]2[CH:3]=[C:4]([CH:8]=[CH:9][CH:10]=2)[C:5]([OH:7])=[O:6])[CH2:15][CH2:16][CH2:17][CH2:18][CH2:19]1Ethyl 3-cyclohexylmethoxy benzoic acid (1.8 g, 6.7 mmol) was dissolved in ethanol (50 ml) and THF (50 ml), wereupon NaOH (4 N, 10 ml) was added, and the solution was stirred overnight at 20° C. To the reaction mixture was added HCl (2 N, 200 ml), and the resulting solution was extracted with DCM (3×100 ml). The combined organic extracts were washed with water (100 ml), dried (MgSO4) and evaporated to give 1.6 g of the title compound. LC-MS (m/z): 236 (M+2).
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