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Bromination of alpha,beta-unsaturated acids of pyridine preparation of 2-bromoethylenes of the pyridine series

M. Bencková and J. Kováč

Research Institute of Chemical Technology, CS-836 03 Bratislava

 

Abstract: Preparation of bromides of 2,3-dibromo-3-(X-pyridinium)propanoic acids (X = 2, 3, 4) by bromination of the respective (E)-3-(X-pyridyl)-2-propenoic acids (X = 2, 3, 4) in chloroform and glacial acetic acid has been described. (Z)-X-(2-Bromovinyl)pyridines (X = 2, 3, 4) were prepared by debromination decarboxylation of alkaline 2,3-dibromo-3-(X-pyridyl)propanoates (X = 2, 3, 4) in acetone. The structures of the prepared derivatives were proved by 1H NMR spectra.

Full paper in Portable Document Format: 433a439.pdf

 

Chemical Papers 43 (3) 439–445 (1989)

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