Sodium Acetate → HCID 86713145, compound

Participants

Reaction Conditions

Reaction Steps

Ethyl (2E)-5-(1-hydroxy-2,6,6-trimethyl-4-oxocyclohex-2-en-1-yl)-3-(trifluoromethyl)pent-2-en-4-ynoate (60 mg, 0.17 mmol), O-methylhydroxylamine hydrochloride (17 mg, 0.21 mmol) and sodium acetate (30 mg, 0.37 mmol) were dissolved in a 1:1 mixture of ethanol and water (4 ml) and then stirred at a temperature of 60° C. for 4 h. After cooling to room temperature, ethanol was removed under reduced pressure and the aqueous phase was extracted repeatedly with dichloromethane. The combined organic phases were dried over magnesium sulfate, filtered and concentrated under reduced pressure. By column chromatography purification of the resulting crude product (ethyl acetate/heptane gradient), ethyl (2E)-5-[1-hydroxy-4-(methoxyimino)-2,6,6-trimethylcyclohex-2-en-1-yl]-3-(trifluoromethyl)pent-2-en-4-ynoate (40 mg, 58% of theory) was obtained in the form of a colorless solid. 1H-NMR (400 MHz, CDCl3 δ, ppm) 6.65/6.63 (s, 1H), 6.00/5.94 (s, 1H), 4.27 (q, 2H), 3.89/3.86 (s, 3H), 2.62/2.56 (br. s, 1H, OH), 2.46 (d, 1H), 2.39 (m, 1H), 2.08/2.05 (s, 3H), 1.31 (t, 3H), 1.18 (s, 3H), 1.11 (s, 3H).

Provenance & Evidence