Bis(iminophosphoranes) as Useful Building Blocks for the Preparation of Complex Polyaza Ring Systems

Author(s): Antonio Arques, Pedro Molina

Journal Name: Current Organic Chemistry

Volume 8 , Issue 9 , 2004


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Abstract:

Several methodologies based on the aza Wittig-type reaction of bis(iminophosphoranes) have been used for the preparation of a wide variety of nitrogen-containing heterocyclic ring systems. The resulting aza Wittig products, functionalized heterocumulenes, undergo cyclization either by electrocyclic ring-closure, intramolecular amination, [2+2] cycloaddition or intramolecular Diels-Alder cycloaddition. The synthetic utility of bis(iminophosphoranes) when the two iminophosphoranes groups show different reactivity (N-iminophosphorane > C-vinyliminophosphorane > C-aryliminophosphorane) toward the same functionality is also reported.

Keywords: wittig-type reaction, bis(iminophosphoranes), diels-alder cycloaddition., iminophosphoranes

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Article Details

VOLUME: 8
ISSUE: 9
Year: 2004
Page: [827 - 843]
Pages: 17
DOI: 10.2174/1385272043370546
Price: $58

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