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Cycloaddition reactions of enoldiazo compounds

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Abstract

Enoldiazo esters and amides have proven to be versatile reagents for cycloaddition reactions that allow highly efficient construction of various carbocycles and heterocycles. Their versatility is exemplified by (1) [2+n]-cycloadditions (n = 3, 4) by the enol silyl ether units of enoldiazo compounds with retention of the diazo functionality to furnish α-cyclic-α-diazo compounds that are themselves subject to further transformations of the diazo functional group; (2) [3+n]-cycloadditions (n = 1–5) by metallo-enolcarbenes formed by catalytic dinitrogen extrusion from enoldiazo compounds; (3) [2+n]-cycloadditions (n = 3, 4) by donor–acceptor cyclopropenes generated in situ from enoldiazo compounds that produce cyclopropane-fused ring systems. The role of dirhodium(II) and the emergence of copper(I) catalysts are described, as are the different outcomes of reactions initiated with these catalysts. This comprehensive review on cycloaddition reactions of enoldiazo compounds, with emphasis on methodology development, mechanistic insight, and catalyst-controlled chemodivergence, aims to provide inspiration for future discoveries in the field and to catalyze the application of enoldiazo reagents by the wider synthetic community.

Graphical abstract: Cycloaddition reactions of enoldiazo compounds

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Publication details

The article was received on 06 May 2017 and first published on 20 Jul 2017


Article type: Review Article
DOI: 10.1039/C7CS00324B
Citation: Chem. Soc. Rev., 2017, Advance Article
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    Cycloaddition reactions of enoldiazo compounds

    Q. Cheng, Y. Deng, M. Lankelma and M. P. Doyle, Chem. Soc. Rev., 2017, Advance Article , DOI: 10.1039/C7CS00324B

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