Nitric Acid → HCID 67903281, compound

Participants

Reaction Steps

Treatment of 2,7-difluoro-4-methyl-9H-fluorenone in acetic acid with a mixture of nitric acid and sulfuric acid gave 2,7-difluoro-4-methyl-5-nitro-9H-fluorenone as the major product. 5-Amino-2,7-difluoro-4-methyl-9H-fluorenone was obtained by reduction using tin(II)chloride in a mixture of ethanol and aqueous hydrochloric acid. Thermal decomposition in hot xylene of the diazonium tetrafluoroborate, formed with sodium nitrite in aqueous fluoboric acid, provided 2,4,7-tri-fluoro-5-methyl-9H-fluorenone. Treatment of the ketone with potassium cyanide and ammonium carbonate in ethanol at 120° C. for 18 hours provided the title compound.

Provenance & Evidence