HCID 54205606, compound → HCID 22337820, compound

Participants

Reaction Steps

A solution of the other isomer of ethyl 4-(2,4-bis{[tert-butyl(dimethyl)silyl]oxy}phenyl)-1-hydroxycyclohexanecarboxylate (25 mg, 0.05 mmol) in methanol (2 ml) was stirred rapidly with Amberlyst A-26 (100 mg) for 18 hr. After this time the reaction mixture was filtered. The resin was then stirred rapidly for 1 hr in a solution of methanol (2 ml) and glacial acetic acid (5 drops). The reaction mixture was filtered and the combined filtrates concentrated in vacuo. Purification via flash column chromatography (SiO2, ethyl acetate/petrol, 2:1) afforded the title compound (5 mg, 34%) as a white solid. δH (d4-MeOH) 1.22 (3H, t), 1.40-1.54 (4H, m), 1.63-1.74 (2H, m), 2.18-2.25 (2H, m), 2.68-2.78 (1H, m), 4.14 (2H, q), 6.11 (1H, dd), 6.15 (1H, d), 6.71 (1H, d); m/z (ES−) 279 (M−H)−.

Provenance & Evidence