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Communication | Regular issue | Vol 3, No. 5, 1975, pp.395-400
Published online, 1st January, 1970
DOI: 10.3987/R-1975-05-0395
An Intriguing Copper Salt Effect upon the Photochemistry of Pyridine-N-oxides. Specific Photoinduced Syntheses of 3-Substituted 2-Formylpyrroles

François Bellamy, Pierre Martz, and Lacques Streith*

*Ecole Nationale Supérieure de Chimie de Mulhouse, Université du Haut-Rhin, 68093 Mulhouse, France


Ultraviolet irradiation of pyridine-N-oxides in water leads to the isomeric 2-formylpyrroles. Copper salts, and especially copper sulfate and copper perchlorate, dramatically increase the yields of the corresponding pyrrole aldehydes.