HCID 67212135, compound → HCID 178450673, compound

Participants

Reaction Steps

To a solution of 4-{(R)-2-[4-(4-tert-Butyl-cyclohex-1-enyl)-phenyl]-2-carboxy-ethyl}-benzoic acid tert-butyl ester (3.0 g) in ethyl acetate (100 mL) added 10% palladium on carbon (300 mg). The mixture was stirred under a balloon filled with hydrogen, until proton NMR indicated the disappearance of the olefinic signal. The reaction was filtered through a plug of celite, and the filtrate was concentrated under reduced pressure to give a mixture of cis/trans isomers (in a ratio of 1:1, based on 1H NMR). The cis1 and trans isomers were separated by reverse phase chromatography with the latter being cis (1.34 g, 2.9 mmol, 35%). 1H NMR (CDCl3): δ 0.95 (9H, s), 1.23-1.38 (4H, m), 1.58 (9H, s), 1.88-1.98 (4H, m), 2.39-2.56 (1H, m), 3.05-3.12 (1H, m), 3.19-3.50 (1H, m), 3.82-3.90 (1H, m), 7.19-7.22 (6H, m), 8.81 (2H, d).

Provenance & Evidence