Flash vacuum pyrolysis of N-(p-chlorophenoxymethyl)azoles (e.g.2 and 3) gives ring expanded products (e.g.4 and 8) formed via N-heteroarylmethyl radicals (e.g.1 and 6); the mechanism of ring expansion generally involves a novel ‘walk’-rearrangement of the radical centre.
J. F. McLellan, H. McNab and T. W. Muir, J. Chem. Soc., Chem. Commun., 1993, 839 DOI: 10.1039/C39930000839
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