113. P. Müller, G. Bernardinelli, Y. Jacquier,
     “Organometallic Derivatives of Cycloproparenes”
     Helv. Chim. Acta 1992, 75, 1995-2008.

The tricarbonylchromium complex of cyclopropa[b]naphthalene (3a) is deprotonated at C(1) with BuLi. Quenching of the resulting anion with Mel results in a 1:1 mixture of stereoisomeric methyl derivatives 6a and 6b. Peterson olefination of the bis-silylated complex 3b affords the complexed alkylidenecycloproparene 5 in low yield. The tricarbonylchromium complex of cyclopropa[b]anthracene (10) is accessible via bis-hydro-desilylation of 9. Its X-ray structure is also reported. All attempts to synthesize a tricarbonylchromium complex of benzocyclopropene (11a) failed.

DOI : 10.1002/hlca.19920750624 

archive ouverte unige:118546