The triple bond of 2-ethynyl-2-adamantanol virtually did not hydrolyze under Kucherov reaction conditions in aqueous ethanol and methanol. In aqueous acetic acid arose a mixture of 2-acetyl-2-adamantanol and its acetate. In good yield the 2-acetyl-2-adamantanol was obtained by Kucherov reaction in aqueous THE This alcohol with acetonitrile under conditions of Ritter's reaction (catalysis with sulfuric acid) afforded a mixture of 1-acetamido-2-acetyl-, 1-acetamido-4-cis- and 1-acetamido-4-trans-acetyladamantanes in 8: 1 : 1 ratio.