(2 + 2) Photosensitized cycloadditions of maleic anhydride derivatives to selenophene and tellurophene derivatives

Autor:	Franklin Vargas, Guillermina Aguiar, A. Torrealba, Carlos Rivas, Rubén Machado
Rok vydání:	1997
Předmět:	chemistry.chemical_compound chemistry General Chemical Engineering General Physics and Astronomy Maleic anhydride Organic chemistry General Chemistry Maleimide Cycloaddition
Zdroj:	Journal of Photochemistry and Photobiology A: Chemistry. 104:53-58
ISSN:	1010-6030
DOI:	10.1016/s1010-6030(96)04590-x
Popis:	The photoadditions of 2,3-dimethylmaleic anhydride to selenophene (C. Rivas, D. Pacheco, F. Vargas, J. Heterocycl. Chem. 17 (1980) 1151) and selenophthene (D. Pacheco, C. Rivas, F. Vargas, J. Heterocycl. Chem. 20 (1983) 1465) and of 2,3-dimethylmaleimide to selenophene and 3,4-dimethylselenophene (C. Rivas, F. Vargas, A. Torrealba, D. Pacheco, R. Machado, G. Aguiar, Monatsh. Chem. 125 (1994) 1153) in benzophenone-photosensitized reactions have been carried out successfully in this laboratory. This reaction has been extended to other methyl-substituted selenophenes and, during the course of this investigation, it was observed that the compounds under study showed a somewhat different behaviour from those mentioned above. The new photoproducts obtained are reported and an attempt is made to give a general view of the photochemical behaviour of methyl selenophenes. Furthermore, tellurophene and benzo(b)tellurophene were also tested as substrates for these (2 + 2) cycloaddition reactions
Databáze:	OpenAIRE
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