C. Vogel et al., CYCLOALKANO-2H-PYRROLE AS A STABLE INTERMEDIATE IN THE CONVERSION OF BETA-CYCLOALKENYL-ALPHA-AZIDOACRYLATES TO CYCLOALKANO-1H-PYRROLES, Angewandte Chemie, International Edition in English, 32(7), 1993, pp. 1051-1052
A quantitative 1,5-electrocyclization takes place on thermolysis of th
e 2-vinyl-cycloalkenyl-alpha-azidoacrylate 1 to form the substituted c
ycloalkano-2H-pyrroles 2. Products of a reaction of vinyl azide or -ni
trene with the unsaturated side chains were not observed.