SCHEDULED MAINTENANCE
Treatment of the imidoyl chlorides 4 with base afforded the imidazoles 6; these formal dimerisation products are the opposite regioisomers to those predicted by an analysis of the frontier molecular orbitals for the cycloaddition of the nitrile ylides 5 to their imidoyl chloride 4 precursors.
P. W. Groundwater, A. J. Morton and R. Salter, J. Chem. Soc., Chem. Commun., 1993, 1789 DOI: 10.1039/C39930001789
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