1-Cyclopropyl-butane-1,3-dione → HCID 11667437, compound

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Reaction Conditions

Reaction Steps

To a stirred solution of 100 mg (0.38 mmol) (2-amino-4,7-dihydro-5H-thieno[2,3-c]pyran-3-yl)-phenyl-methanone in 5 ml acetic acid was added 73 mg (0.57 mmol) of 1-cyclopropyl-butane-1,3-dione (prep. described in the patent DE 94-4404059) and one drop of sulfuric acid. The mixture was then stirred at 70° C. for 2 hours and then concentrated in vacuo. Flash chromatography (heptane/ethyl acetate 3:1) afforded 50 mg (37%) cyclopropyl-(2-methyl-4-phenyl-5,8-dihydro-6H-7-oxa-9-thia-1-aza-fluoren-3-yl)-methanone as a yellow solid. ES-MS m/e (%): 350 (M+H+, 100).

Provenance & Evidence