THE 1,5-ADDITION REACTION OF LITHIUM DIORGANOCUPRATES TO METHYLENECYCLOPROPYL KETONES

We have demonstrated these readily available methylenecyclopropyl ketones reacted in moderate to high yields with dimethyl and dibutyl cuprates, although a number of products were formed. Of these reagents, dibutyl cuprate proved more selective by only adding to be olefin ring carbon of the alkyl or alkyl ketones