THE PHOTOCHEMICAL REACTIONS OF α,β:γ,δ-UNSATURATED DIAZO COMPOUNDS AT LOW TEMPERATURE

Article abstract of DOI:10.1016/S0040-4020(01)82435-2

The α,β:γ,δ-unsaturated tosylhydrazone lithium salts (4) undergo photolysis at -60 deg C to give vinylcyclopropenes (10) and <1,2>diazeto<1,4-a> pyrroles (11) and/or (12). The formation of (11, X=H) establishes the intermediacy of (8, X=H) in the formatio