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Note | Regular issue | Vol 51, No. 7, 1999, pp.1631-1638
Published online, 1st January, 1970
DOI: 10.3987/COM-99-8519
The Photochemistry of 2-Diazo- and 3-Diazopyrroles

Silvestre Buscemi,* Andrea Pace, Girolamo Cirrincione, and Patrizia Diana

*Dipartimento di Chimica Organica "E. Paterno", Universita di Palermo, Viale delle Scienze, Parco d'Orleans II, 90128 Palermo, Italy


The photochemistry of 2-diazo- and 3-diazopyrroles has been investigated. The irradiation of 2-diazo-3-cyano-4-methyl-5-phenylpyrrole in various reaction solvents brings to a photolytic singlet carbene intermediate, which evolves into 2-substituted pyrroles. A substituent effects has been recognized in the irradiations of some 3-diazopyrroles in methanol.