反应详情

1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.06 g; 1.2 eq) was added to a solution of 5-ethyl-thiophene-3-carboxylic acid (0.04 g; 1 eq.) in DCM (1 mL/100 mg of starting material). This mixture was stirred at room temperature for 5 minutes, then 1,3,3-trimethyl-6-aza-bicyclo[3.2.1]octane (0.043 g; 1.1 eq.) added and the mixture allowed to stir for 18 hours. Water (1 mL/100 mg of starting material) was then added and the organic layer separated, dried and evaporated to give the crude product which was purified by column chromatography (EtOAc/iso-hexane) to give the title compound (0.046 g). LCMS m/z 292 [M+H]+ RT=4.28 min (Analytical Method 3).

1. stirringto stir for 18 hours
2. customthe organic layer separated
3. customdried
4. customevaporated
5. customto give the crude product which
6. customwas purified by column chromatography (EtOAc/iso-hexane)