反应详情

5-cyclohex-1-enyl-3-(4-[1,2,4]triazol-1-yl-cyclohexylamino)-thiophene-2-carboxylic acid methyl ester (555 mg, 1.436 mmol) was treated with a 1M solution of trans-4-methylcyclohexanecarbonyl chloride in toluene (2.87 mL, 2.87 mmol). Pyridine (128 μl, 1.58 mmol) was added and the mixture was stirred at reflux overnight under nitrogen. It was cooled to room temperature and dilute with EtOAc. The resulting mixture was washed twice with a saturated aqueous sodium bicarbonate and once with brine, dried over Na2SO4 and concentrated. The crude was purified by silica gel column chromatography using a gradient from 50% EtOAc:hexanes to 100% EtOAc as eluent to afford 5-cyclohex-1-enyl-3-[(trans-4-methyl-cyclohexanecarbonyl)-(4-[1,2,4]triazol-1-yl-cyclohexyl)-amino]-thiophene-2-carboxylic acid methyl ester (494 mg, 67%) as a yellow mixture of cis and trans isomers.

1. temperatureat reflux overnight under nitrogen
2. washThe resulting mixture was washed twice with a saturated aqueous sodium bicarbonate and once with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated
5. customThe crude was purified by silica gel column chromatography