Abstract The ate-complexes of 3, 8-dimethyl-, 3, 4, 8-trimethyl-and 3, 4, 4, 8-tetramethyl-3- borabicyclo [4.3. 1] decane react with acetyl chloride to produce the corresponding 2-(3- methylene-5-methylcyclohex-1-yl) alkyl (dimethyl) boranes. The reaction involves the abstraction of a hydride ion from the bridgehead β-carbon atom. The organoboron compounds thus obtained were oxidized with alkaline hydrogen peroxide to the ...