Reactivity of Germene Mes<sub>2</sub>GeCR<sub>2</sub> with Cumulative Unsaturation-Containing Compounds: Synthesis of New Germanium Heterocycles
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Germene 1 reacts with the CO and CS double bonds respectively of phenylisocyanate and methylisothiocyanate by formal [2+2] cycloadditions, leading to four-membered ring derivatives 2 and 3. With CS2, dithiagermolane 11 and dithiadigermetane 12 are obtained; the first step of this reaction is probably a formal [2+2] cycloaddition between the GeC and CS double bonds. With nitromethane, oxazadigermolidine 19 and fluorenone are obtained, the first step likely being a [2+3] cycloaddition between the GeC double bond and the NO2 moiety. Compounds 11 and 19 were characterized by X-ray diffraction analysis.
创建时间：
2005-10-24
