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Your search keyword '"Borah, Pallabi"' showing total 3 results
Start Over Author "Borah, Pallabi" Topic coumarin derivatives
3 results on '"Borah, Pallabi"'

1. Synthesis of Functionalized Dihydrofurocoumarin Derivatives from 3-Aminoalkyl-4-hydroxycoumarin.

Author

Borah, Pallabi, Naidu, P. Seetham, and Bhuyan, Pulak J.

Subjects
*PSORALENS, *CHEMICAL synthesis, *COUMARIN derivatives, *ALKYLATION, *ALDEHYDES, *HETEROCYCLIC compounds
Abstract

Some dihydrofuro-fused coumarin derivatives were synthesized from 3-aminoalkyl-4-hydroxycoumarin via in situ generation ofN-ylide. The 3-aminoalkylated 4-hydroxycoumarin derivatives were synthesized from one-pot, three-component reaction of 4-hydroxycoumarin, aryl aldehydes, and secondary amines in ethanol at room temperature. Again, when salicylaldehyde was employed instead of benzaldehyde, interestingly pyranocoumarins were obtained. The reaction protocol can be further explored toward the synthesis of many other heterocyclic fused dihydrofurans. [ABSTRACT FROM AUTHOR]

Published
2015
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2. Synthesis of some tetrazole fused pyrido[2,3-c]coumarin derivatives from a one-pot three-component reaction via intramolecular 1,3-dipolar cycloaddition reaction of azide to nitriles

Author

Borah, Pallabi, Seetham Naidu, P., and Bhuyan, Pulak J.

Subjects
*ORGANIC synthesis, *TETRAZOLES, *COUMARIN derivatives, *RING formation (Chemistry), *SODIUM azide, *ACETONITRILE, *ALKYL group
Abstract

Abstract: Some novel tetrazole fused pyrido[2,3-c]coumarin derivatives 5/7/9 were synthesized from a one-pot three-component reaction of 4-chloro-3-formylcoumarins 2, sodium azide 3, and alkyl/aryl acetonitriles 4/6/8. [Copyright &y& Elsevier]

Published
2012
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3. Synthesis of some novel spiro substituted pyrido[2,3-c]coumarins by exploring ‘tertiary amino effect’ reaction strategy.

Author

Borah, Pallabi and Bhuyan, Pulak J.

Subjects
*HETEROCYCLIC compounds synthesis, *COUMARINS, *SUBSTITUTION reactions, *SPIRO compounds, *AMINO group, *CHEMICAL reactions, *COUMARIN derivatives
Abstract

Abstract: Some novel spiro substituted pyrido[2,3-c]coumarin derivatives were synthesized from 4-hydroxycoumarin by exploring ‘tertiary amino effect’ reaction strategy. [Copyright &y& Elsevier]

Published
2013
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