The synthesis of 2,2-dialkyl-3-cyanomethylene-4-dialkylmethylenecyclobutanecarbonitriles by dimerisation of allenic nitriles is described. Spectroscopic and dipole moment data provide conclusive evidence for the structure of the dimers.
C. W. N. Cumper, Z. T. Fomum, P. M. Greaves and S. R. Landor, J. Chem. Soc., Perkin Trans. 2, 1973, 885 DOI: 10.1039/P29730000885
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