[2,3-14C2]Pyridine has been prepared from [1,2-14C2]acetylene and converted into the corresponding [14C4]2,2′- and [14C4]4,4′-bipyridyls. NN′-Ethylene-[14C4]2,2′-bipyridylium dibromide and NN′-dimethyl-[14C4]4,4′-bipyridylium dichloride and di(methyl sulphate), which possess herbicidal activity, have been prepared for biological tracer studies.
M. J. Dunn, R. J. Martin, N. L. Roberts, P. Slade, H. Standen and P. Walker, J. Chem. Soc. C, 1966, 1468 DOI: 10.1039/J39660001468
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