Coupling of α-amino carboxylic esters with p-nitrobenzenediazonium tetrafluoroborate, or 2,4-dinitrobenzenediazonium tetrafluoroborate in NN-dimethylformamide, in the presence of base, yields the corresponding α-diazo carboxylic esters and the corresponding aniline, by base-induced scission of the triazenes initially formed.
J. F. McGarrity, J. Chem. Soc., Chem. Commun., 1974, 558 DOI: 10.1039/C39740000558
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