Ethyl Acrylate → Ethyl 3-[6-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-5-methyl-3,4-dihydro-2(1H)-isoquinolinyl]propanoate

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Reaction Conditions

Reaction Steps

To a suspension of 6-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-5-methyl-1,2,3,4-tetrahydroisoquinoline trifluoroacetate (Example 10; 90 mg; 0.18 mmol) in acetonitrile (3 ml) was added 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU; 0.16 ml; 1.09 mmol). Ethyl acrylate (0.03 ml; 0.27 mmol) was added to the solution and the resulting mixture stirred at 70° C. for 0.5 h. The mixture was cooled to room temperature and the solvent removed. The residue was partitioned between ethyl acetate and brine, and the aqueous layer further extracted with ethyl acetate. The combined organic layers were washed with brine, dried (MgSO4) and concentrated in vacuo to give the title compound (90 mg).

Provenance & Evidence