2-Methyl-3-nitro-4H-1-benzopyran-4-one → HCID 13431757, compound

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Reaction Steps

A mixture of 2-methyl-3-nitro-4H-1-benzopyran-4-one (5.0g, 0.244 mole) and 10% palladium on charcoal (0.75g) in ethanol (250 ml) was shaken under a hydrogen atmosphere in a Parr shaker for 40 minutes. The catalyst was filtered off, and the solvent was removed under reduced pressure to give yellow solids. Recrystallization from benzene gave yellow crystals (2.4g, 56%), m.p. 118°-20° C.

Provenance & Evidence