N-Nitroso-N,N′-diarylamidines (1) and N-(1,2,3,4,5-pentakismethoxycarbonylcyclopentadienyl)-N,N′-diarylamidines (2) prepared by the reaction of N,N′-diarylamidines with 5-nitro-1,2,3,4,5-pentakismethoxycarbonylcyclopentadiene show fluxional behaviour arising from degenerate sigmatropic 1,3-shifts of the nitroso group in (1) and 3,3-shifts of the amidinyl moiety in (2).
V. I. Minkin, I. E. Mikhailov and G. A. Dushenko, J. Chem. Soc., Chem. Commun., 1988, 1181 DOI: 10.1039/C39880001181
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