Journal
JOURNAL OF HETEROCYCLIC CHEMISTRY
Volume 58, Issue 8, Pages 1695-1699Publisher
WILEY
DOI: 10.1002/jhet.4280
Keywords
Multicomponent; naphthofuran; nitrostyrene; Pyrazole; Silica sulfuric acid
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The synthesis of naphtho[2,1-b]furan derivatives and functionalized pyrazole derivatives under solvent-free conditions using silica sulfuric acid as a catalyst has been developed, with significant advantages such as simple operation, shorter reaction times, and high yields of products.
Silica sulfuric acid (SSA) mediated synthesis of naphtho[2,1-b]furan derivatives starting from beta-nitrostyrene derivatives and beta-naphthol derivatives under solvent-free conditions have been developed. The scope of SSA as a heterogeneous catalyst is extended to one-pot multicomponent reaction for the synthesis of functionalized pyrazole derivatives under solvent-free conditions from readily available beta-nitrostyrene derivatives, acetyl acetone, and hydrazine hydrate. The synthetic methods have significant advantages such as solvent-free conditions, simple operation, shorter reaction times, ease and clean isolation procedures, and very good yields of products.
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