γ-Aminoadamantanecarboxylic Acids Through Direct C–H Bond Amidations
作者:Lukas Wanka、Chiara Cabrele、Maksims Vanejews、Peter R. Schreiner
DOI:10.1002/ejoc.200600975
日期:2007.3
bromine-free, direct C–H bond amidations we have synthesized a large variety of adamantane amides. Depending on the precursors used these amides directly yield pharmaceutically active aminoadamantanes or γ-aminoadamantanecarboxylic acids after hydrolytic cleavage. Theserigid analogues of γ-aminobutyric acid (GABA) were protected at the C- and N-termini and we synthesized a number of peptides incorporating γ-a
The present invention concerns a new process for synthesising aminoadamantanes of formula I
in which R1 and R2 are identical or different and are H or a straight or branched alkyl group comprising from 1 to 6 carbon atoms, and addition salts thereof with inorganic or organic acids, in particular memantine hydrochloride (1-amino-3,5-dimethyladamantane hydrochloride).
Method for Producing 1-Formamido-3,5-Dimethyladamantane
申请人:Schreiner Peter R.
公开号:US20090299097A1
公开(公告)日:2009-12-03
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.
Amidoadamantanes and Method for Producing the Same
申请人:Schreiner Peter R.
公开号:US20090299096A1
公开(公告)日:2009-12-03
The invention relates to 1-formamido-adamantane derivatives of formula (I), which carry the substituents R
1
, R
2
or R
3
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 SO
3
containing sulfuric acid or 100% azotic acid.