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Communication | Special issue | Vol 77, No. 2, 2009, pp.811-816
Published online, 9th September, 2008
DOI: 10.3987/COM-08-S(F)82
Reaction of 9-Germaphenanthrene with Dimethyl Acetylenedicarboxylate: Unexpected Formation of a 1,2-Oxagermolane Derivative

Yoshiyuki Mizuhata, Koji Inamura, and Norihiro Tokitoh*

*Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan

Abstract

The reaction of 9-germaphenanthrene with dimethyl acetylenedicarboxylate (DMAD) in benzene afforded a 1:2 adduct containing 1,2-oxagermolane and cyclopentadiene units, the structure and generation mechanism of which are discussed based on X-ray structural analysis and theoretical calculations.