Effects of electron-withdrawing group on the photoisomerization of tetraaryl-4H-thiopyran-1,1-dioxides

Autor:	Hooshang Pirelahi, Farnaz Jafarpour, Fatemeh Ramezani
Rok vydání:	2008
Předmět:	Thiopyran chemistry.chemical_compound 1h nmr spectroscopy chemistry Photoisomerization Excited state Heteroatom Polar effect General Chemistry Medicinal chemistry Sulfone
Zdroj:	Heteroatom Chemistry. 19:557-561
ISSN:	1098-1071 1042-7163
Popis:	Syntheses and photoisomerization of the new sulfone derivatives, 4,4-di (p-trifluoromethylphenyl)-2,6-diphenyl-4H-thiopyran-1, 1-dioxide and 4-(p-trifluoromethylphenyl)-2,4,6-triphenyl-4H-thiopyran-1,1-dioxide, have been investigated. The relative molar ratios of the photoproducts are compared with those of 2,4,4,6-tetraphenyl-4H-thiopyran-1,1-dioxide as well as electron-donating substituted 4-methyl-2,4,6-triaryl-4H-thiopyran-1,1-dioxides as model compounds under identical experimental conditions using 1H NMR spectroscopy. The results observed are discussed on the basis of a triplet excited state di-π-methane rearrangement. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:557–561, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20455
Databáze:	OpenAIRE
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