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US 7,683,189 B2Granted
Process for producing aminobenzopyran compound
AssigneeNissan Chemical Industries, Ltd.
InventorsTakanori Shimizu, Hiroo Matsumoto
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Abstract
There is provided a method for producing aminobenzopyran compound, which results in little wastes, has no influence on reactors and necessitates a simple work-up procedure. Concretely, it is a method for producing aminobenzopyran compound of formula (2) characterized by reducing a nitro group on 2,2-dimethyl 2H-1-benzopyran compound of formula (1) with hydrazine in the presence of a metal catalyst.
Claims6
A method for producing aminobenzopyran compound of formula (2)
- characterized by reducing a nitro group on 2,2-dimethyl 2H-1-benzopyran compound of formula (1)
- with hydrazine in the presence of platinum or palladium as a metal catalyst.
Dependencies are inferred from the claim text.