Me. Gonzalezrosende et al., REACTION OF N-SUBSTITUTED 2-FORMYLPYRROLES WITH AZODICARBONYLIC COMPOUNDS, Journal of chemical research. Synopses, (6), 1995, pp. 260-261
N-Substituted 2-formylpyrroles react with diethyl azodicarboxylate aff
ording products derived from Michael additions at the C-5 position of
the pyrrole ring and radical reactions on the formyl group; with 4-phe
nyl-1,2,4-triazole-3,5-dione Michael adducts only were isolated.