Abstract: The invention relates to a method for producing 1-formamido-3,5-dimethyladamantane in only two reaction steps by direct formamide formation of 1,3-dimethyladamantane, the 1,3-dimethyladamantane being reacted with formamide in concentrated acids.

Abstract: The invention relates to a method for producing 1-formamido-3,5-dimethyladamantane in only two reaction steps by direct formamide formation of 1,3-dimethyladamantane, the 1,3-dimethyladamantane being reacted with formamide in concentrated acids.

Abstract: The invention relates to 1-formamido-adamantane derivatives of formula (I), which carry the substituents R1, R2 or R3 in 3, 5 and/or 7 position, the substituents being defined as follows: hydrogen, a linear or branched alkyl, alkenyl or alkinyl group with up to 6 C atoms, an aliphatic or aromatic, cyclic or heterocyclic hydrocarbon group with up to 10 carbon atoms, and formamides of hydrocarbons from the group of diamondoids, for example diamantane, triamantane, tetramantane and pentamantane, however, with the exception of 1-formamido-3,5-dimethyladamantane. The invention also relates to a method for the direct formation of formamide or acetamide of adamantane, adamantane derivatives with the aforementioned definition of substituents or of a hydrocarbon from the group of diamondoids, characterized by reacting the adamantane, the adamantane derivative or the diamondoid with formamide, acetamide or acetonitrile in concentrated acids, while avoiding SO3 containing sulfuric acid or 100% azotic acid.