Ortho-palladated imines of α-amino acid esters are deprotonated by triethylamine at ambient temperature and the resulting metallo-1,3-dipoles can be trapped by cycloaddition to N-phenylmaleimide in good yield.
R. Grigg and J. Devlin, J. Chem. Soc., Chem. Commun., 1986, 631 DOI: 10.1039/C39860000631
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