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Silyl enol ethers of cycloalkanones are converted into spiro cydopropylmethanols with CH2l2/ZnEt2 . The reaction of ketene monosilyl acetals with CHBr3/ZnEt2 gives cyclopropanecarboxylic esters (equation 100)". 1-Cyanocyclo pro panecar boxy lie esters... [Pg.344]

In agreement with these results Krapcho and Jahngen s attempts to utilize cyclopropanecarboxylic acid (216) in the reactions of a-anions of cycloalkanecarboxylic acid salts with cycloalkanones have been unsuccessful. [Pg.771]

Potassium tert-butoxide Cyclopropanecarboxylic acids from cycloalkanones and lactones... [Pg.576]