Methyl propiolate → HCID 22258252, compound

Participants

Reaction Steps

250 mg (0.9 mmol) of the compound of Example IX are dissolved in 2 ml Methanol. 50 mg (0.925 mmol) sodium methylate are added at room temperature and the mixture is stirred for 30 min. 75.9 mg (0.9 mmol) methyl propiolate are added and the reaction mixture is stirred for 20 h at room temperature. The solvent is evaporated under vacuum and the crude is purified over preparative HPLC (RP18-Column, Eluent: Acetonitrile-Water Gradient) to yield 113 mg (43% of th.) 4-benzoyl-6,7,8,9-tetrahydropyrido[1,2-a]benzimidazol-1(5H)-one.

Provenance & Evidence