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Your search keyword '"Borah, Pallabi"' showing total 5 results
Start Over Author "Borah, Pallabi" Topic chemical reactions
5 results on '"Borah, Pallabi"'

1. DMSO and iodine mediated reaction of 4-hydroxycoumarins and aldehydes/aryl methyl ketones: synthesis of furo[3,2-c]coumarins.

Author

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

Subjects
*DIMETHYL sulfoxide, *IODINE, *CHEMICAL reactions, *COUMARINS, *METHYL ketones, *ALDEHYDE synthesis, *PSORALENS
Abstract

A simple and efficient method for the synthesis of highly functionalized furo[3,2- c ]coumarins was developed. The reaction occurred via initial formation of biscoumarins from the reaction of 4-hydroxycoumarins and aldehydes/aryl methyl ketones in the presence of molecular iodine in DMSO followed by lactone ring opening, cyclization and oxidative aromatization process. The reaction conditions were moderate, work-up procedure was simple and products were obtained in high yield. [ABSTRACT FROM AUTHOR]

Published
2016
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2. InCl 3 -Catalyzed, Three-Component Reactions for the Synthesis of Some Novel Functionalized/Annulated Barbituric Acids.

Author

Sharma, Meenakshi, Borah, Pallabi, and Bhuyan, Pulak J.

Subjects
*INDIUM chlorides, *METAL catalysts, *CHEMICAL reactions, *ANNULATION, *AMINO acid derivatives, *MANNICH reaction
Abstract

Some novel 5-aminoalkylbarbituric acids and corresponding chromene derivatives were synthesized via a one-pot, three-component Mannich reaction starting from 1,3-dimethylbarbituric acid, arylaldehydes, and amines. [ABSTRACT FROM PUBLISHER]

Published
2015
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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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4. Synthesis of some novel functionalized dihydropyrido[2,3-d]pyrimidines via an one-pot three-component reaction catalysed by InCl3

Author

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

Subjects
*PYRIMIDINE synthesis, *CATALYSIS, *INDIUM chlorides, *PYRIMIDINE derivatives, *URACIL, *ALDEHYDES, *INDOLE, *CHEMICAL reactions
Abstract

Abstract: Some novel functionalized dihydropyrido[2,3-d]pyrimidine derivatives 4 were synthesized using a one-pot three-component reaction of 6-aminouracils 1, aryl aldehydes 2 and 3-cyanoacetyl indole 3 using InCl3 as catalyst. [Copyright &y& Elsevier]

Published
2012
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5. ChemInform Abstract: 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
*COUMARINS, *HETEROCYCLIC compounds synthesis, *AMINO acid analysis, *CHEMICAL reactions, *PYRAN derivatives, *PYRIDINE derivatives, *CYCLIC compounds
Abstract

A four-step sequence is presented for the conversion of 4-hydroxycoumarin into spiro substituted pyridocoumarin (VIII). [ABSTRACT FROM AUTHOR]

Published
2014
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