5-Methyl-2-thiophenecarboxaldehyde → HCID 67331876, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-amino-4-(ethylsulfonyl)phenol (452.7 mg, 2.25 mmol) in ethanol (17 mL) was added 5-methyl-2-thiophenecarboxaldehyde (242 μL, 2.25 mmol). The mixture was heated at 70° C. for 70 min. After cooling, a small amount of precipitate was formed. After filtration and evaporation of the filtrate, the resulting product was dissolved in acetonitrile (9.8 mL) and lead tetraacetate (887 mg, 2 mmol) was added. The resulting mixture was heated at 100° C. for 5 min. After cooling, the reaction mixture was filtered off, and the filtrate evaporated in vacuo. The resulting mixture was purified by column chromatography eluting with ethyl acetate/hexanes 20:80 v/v, and then purified by reverse phase HPLC to afford 2.2 mg (0.3%) of the title product (LCMS RT=6.41 min, MH+ 308.1)

Provenance & Evidence