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US 11,608,317 B2Granted
Two-step synthesis of pyrrole compounds from furan compounds
AssigneeChevron Phillips Chemical Company LP
InventorKenneth M. Lassen
Life of this patent
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Abstract
Pyrrole compounds are produced by contacting a furan compound, a solid acid catalyst, and water to form a reaction mixture containing a γ-dicarbonyl compound, and then contacting the γ-dicarbonyl compound with ammonia or an ammonium salt to form a reaction product mixture containing the pyrrole compound. A representative pyrrole compound that can be synthesized using these processes is 2,5-dimethylpyrrole.
Claims21
A process for producing a pyrrole compound, the process comprising:
- a) contacting a furan compound, a solid acid catalyst, and water to form a reaction mixture comprising a γ-dicarbonyl compound, wherein a molar ratio of water to the furan compound is in a range from 0.5:1 to 10:1;
- and
- b) contacting the γ-dicarbonyl compound with ammonia, an ammonium salt, or a combination thereof, to form a reaction product mixture comprising the pyrrole compound.
Dependencies are inferred from the claim text.