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Synthesis of Tetrasubstituted Allenes via Palladium-Catalyzed Cross-Coupling of Vinyl Bromides with Diazo Compounds

12 December 2019, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

A highly efficient palladium-catalyzed cross-coupling of 2,2-diarylvinyl bromides with diazo compounds was developed, providing a convenient approach for the synthesis of tetrasubsti-tuted allenes. Both aryl diazo carbonyl compounds and N-tosylhydrazones are competent carbene precursors in this reaction. An unprecedented hydrogen elimination of the π-allyl palladium intermediate is proposed to be the key step.

Keywords

allene molecule
diazo acetates
Cross-Coupling Reactions
Palladium Catalysis

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Version History

Dec 12, 2019 Version 1

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The content is available under CC BY NC ND 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv.11316842.v1
D O I: 10.26434/chemrxiv.11316842.v1 [opens in a new tab]

Author’s competing interest statement

The authors declare no competing financial interests.

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