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ChemInform Abstract: γ-Alumina as a Recyclable Catalyst for the Four-Component Synthesis of 6-Amino-4-alkyl/aryl-3-methyl-2,4-dihydropyrano [2,3-c]pyrazole-5-carbonitriles in Aqueous Medium.

✍ Scribed by Hormi Mecadon; Md. Rumum Rohman; Mantu Rajbangshi; Bekington Myrboh

Publisher: John Wiley and Sons
Year: 2011
Weight: 30 KB
Volume: 42
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.201134135

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ChemInform Abstract: L-Proline as an Eff

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## Abstract A four‐component synthesis of title compounds (IV) using L‐proline as a catalyst is established.

ChemInform Abstract: New Convenient Four

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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: A New Convenient Fo

ChemInform Abstract: A New Convenient Four-Component Synthesis of 6-Amino-2H,4H-pyrano[2,3-c]pyrazole-5-carbonitriles and One-Pot Synthesis of 6′-Amino-5′-cyano-1,2-dihydrospiro[(3H)-indole-3,4′-(4′-H)-pyrano [2,3-c]pyrazol]-2-ones (VIII).

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ChemInform Abstract: Four-Component Catalyst-Free Reaction in Water: Combinatorial Library Synthesis of Novel 2-Amino-4- (5-hydroxy-3-methyl-1H-pyrazol-4-yl)-4H-chromene-3-carbonitrile Derivatives.

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ChemInform Abstract: DBU: A Highly Effic

ChemInform Abstract: DBU: A Highly Efficient Catalyst for One-Pot Synthesis of Substituted 3,4-Dihydropyrano[3,2-c]chromenes, Dihydropyrano[4,3-b]pyranes, 2-Amino-4H-benzo[h]chromenes and 2-Amino-4H-benzo[g]chromenes in Aqueous Medium.

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ChemInform Abstract: Mg—Al Hydrotalcite

ChemInform Abstract: Mg—Al Hydrotalcite as a First Heterogeneous Basic Catalyst for the Synthesis of 4H-Pyrano[2,3-c]pyrazoles Through a Four-Component Reaction.

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## Abstract The used heterogeneous catalyst Mg‐Al hydrotalcite can be easily removed from the reaction mixture by filtration.