Journal
CURRENT ORGANIC CHEMISTRY
Volume 8, Issue 9, Pages 827-843Publisher
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1385272043370546
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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 Diets-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.
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