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Issue 87, 2013
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Phosphazene-catalyzed intramolecular cyclization of nitrogen-tethered alkynyl esters

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Abstract

Intramolecular cyclization of nitrogen-tethered alkynyl esters catalyzed by phosphazene organosuperbases P2-tBu and P4-tBu was investigated. Both acyclic and cyclic substrates underwent 5-exo-dig and 5-endo-dig cyclization. This reaction is a rare example of the intramolecular addition of enolates of simple esters to alkynes.

Graphical abstract: Phosphazene-catalyzed intramolecular cyclization of nitrogen-tethered alkynyl esters

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Publication details

The article was received on 09 Aug 2013, accepted on 10 Sep 2013 and first published on 10 Sep 2013


Article type: Communication
DOI: 10.1039/C3CC46100A
Citation: Chem. Commun., 2013,49, 10254-10256
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    Phosphazene-catalyzed intramolecular cyclization of nitrogen-tethered alkynyl esters

    A. Kondoh, K. Ando and M. Terada, Chem. Commun., 2013, 49, 10254
    DOI: 10.1039/C3CC46100A

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