The cycloaddition of t-butylcyanoketen (1) and N-methylbenzylideneamine affords the binuclear heterocycle (5), which seems to result from the interception of the intermediate highly strained ketenimine (4) by an excess of (1); the crystal and molecular structure of (5) has been determined.
E. Schaumann, H. Mrotzek and G. Adiwidjaja, J. Chem. Soc., Chem. Commun., 1978, 820 DOI: 10.1039/C39780000820
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