One-Pot Tandem 1,3-Dipolar Cycloaddition of Azinium Ylides Using Water as Solvent

ISSN: 2213-347X (Online)
ISSN: 2213-3461 (Print)


Volume 1, 3 Issues, 2014






Current Green Chemistry

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Budapest University of Technology and Economics
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One-Pot Tandem 1,3-Dipolar Cycloaddition of Azinium Ylides Using Water as Solvent

Author(s): Deepika Singh, Pragya Sinha and Raj K. Bansal

Affiliation: Department of Chemistry, The IIS University, Mansarovar, Jaipur, 302020 India.

Abstract

Following an important principle of Green Chemistry, namely the use of a benign solvent, the reaction of azines, namely pyridine, isoquinoline and phenanthridine with phenacyl bromides or with t-butyl bromoacetate has been accomplished in water to generate an aqueous solution of the (substituted methyl)azinium bromides, which on further reacting with dimethyl acetylenedicarboxylate (DMAD) and potassium carbonate furnish annelated pyrroles through tandem formation of the azinium methylides followed by 1,3-dipolar cycloaddition. In one case, maleic anhydride could also be used as 1,3-dipolarophile. The products are obtained in good yields and have been well characterized.




Keywords: Azinium ylides, 1, 3-Dipolar cycloaddition, DMAD, maleic anhydride, pyrrolo[1, 2-f]phenanthridines, water as solvent.

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Article Details

Volume: 1
Issue Number: 3
First Page: 227
Last Page: 231
Page Count: 5
DOI: 10.2174/2213346101666140210194354
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