Silver homoenolates

Palladium Homoenolates Generated In Situ 1.14.7J Silver Homoenolates... 

Siloxycyclopropanes are known as homoenolate anion equivalents and have been favorably utilized in organic synthesis. Murai, Sonoda, and coworkers found that desi-lylative dimerization of the siloxycyclopropanes occurs on exposure to AgBp4 [26a], The reaction of 54 gives 1,6-diketone 55 in good yield (Sch. 13). The 8-silver ketone 56 is considered to be a key intermediate in the dimerization. The intermediary ver ketone, generated from siloxycyclopropane 57 and AgP, can be successfully trapped with allyl chloride to afford a (5,e-unsaturated ketone 58 [26b]. 

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