Abstract
Abstract Treatment of an overcrowded diarylgermylene bearing 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl and 2,4,6-triisopropylphenyl groups with tribenzylamine N-oxide gave the corresponding diarylgermanone 4, the first example of a stable germanium-oxygen double-bond compound. Germanone 4 was stable in solution at room temperature for a short time and underwent [2+3]cycloaddition with mesitonitrile oxide, while in the absence of such a trapping reagent 4 gave two diastereomeric intramolecular cyclization products 8 and 9.
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