Methyl (8-methyl-8-azabicyclo[3.2.1]octan-3-ylidene)acetate → HCID 11484351, compound

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Reaction Steps

A solution of (8-methyl-8-aza-bicyclo[3.2.1]oct-3-ylidene)-acetic acid methyl ester (200 mg, 1.02 mmol) in THF (3 mL) was mixed with 2-thienyllithium (2.02 mL, 1.0 M in THF, 2.02 mmol). The mixture was stirred overnight at r.t., diluted with saturated NH4Cl aqueous solution (20 mL) and extracted with EtOAc. The combined organic phases were dried over MgSO4 and concentrated. Flash chromatography (90% CH2Cl2, 8% CH3OH, 2% NH4OH) then afforded the title compound (132 mg, 39%): LCMS (ES) m/z 332 (M+H)+; 1H-NMR(MeOD) δ 1.35 (m, 1H), 1.61 (m, 1H), 1.81 (m, 1H), 1.95 (m, 1H), 2.12 (m, 3H), 2.29 (s, 3H), 2.37 (m, 1H), 2.68 (m, 1H), 3.03 (m, 1H), 3.22 (m, 1H), 3.32 (s, 1H), 6.15 (s, 1H), 6.95 (m, 4H), 7.30 (m, 2H).

Provenance & Evidence