Chemical Transformations of Tetracyclo[3.3.1.1.3,7.0.1,3]decane (1,3-Dehydroadamantane): VIII. Reaction of 1,3-Dehydroadamantane with Aliphatic Aldehydes

The reaction of 1,3-dehydroadamantane with aliphatic aldehydes involves the C a -H bond and forms hardly accessible branched 2-(1-adamantyl)alkylaldehydes in one stage in a yield of 60-78%. It is found that 2-(1-adamantyl)alkylaldehydes are prone to oligomerization. The reaction of 2-(1-adamantyl)-alkylaldehydes with 2,4-dinitrophenylhydrazine gave the corresponding hydrazones in a yield of 84-98%.