2008

200817.fm Seite 188 Dienstag, 25. März 2008 8:48 08

Organo-selenium compoundsS 0130 Selenium-Containing Tetrachalcogenins and Pentachalcogenepins Fused to Aro-

matic Systems. — The target compounds are prepared by deprotection of the corre-sponding thiaselenastannoles followed by ring closure with S8/NH3. Trithiaselenin and dithiadiselenin analogues are obtained via a controlled reaction with S2Cl2. Bulkysubstituents such as isopropyl or methoxy or extended π-systems such as naphthalene or penanthrene are required as kinetic and thermodynamic stabilizers, respectively. Al-most all compounds are sensitive to heat, light, air, and polar solvents. — (ALAM, A.; OGAWA, S.; MURAOKA, H.; KON-NO, M.; NAKAJO, S.; SATO*, R.; Eur. J. Org. Chem. 2007, 36, 6097-6105; Dep. Chem. Eng., Fac. Eng., Iwate Univ., Morioka, Iwate 020, Japan; Eng.) — Kieslich

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