210482-10-3Relevant academic research and scientific papers
Antibacterial Agents
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Page/Page column 7-8; 13, (2008/12/07)
Naphthalene, quinoline, quinoaline and naphthyridine derivatives useful in the treatment of bacterial infections in mammals, particularly humans, are disclosed herein.
Mono- and disubstituted N,N-dialkylcyclopropylamines from dialkylformamides via ligand-exchanged titanium - Alkene complexes
De Meijere, Armin,Williams, Craig M.,Kourdioukov, Alexandre,Sviridov, Sergei V.,Chaplinski, Vladimir,Kordes, Markus,Savchenko, Andrei I.,Stratmann, Christian,Noltemeyer, Mathias
, p. 3789 - 3801 (2007/10/03)
Dibenzylformamide was treated with cyclohexylmagnesium bromide in the presence of either titanium tetraisopropoxide or methyltitanium triisopropoxide and a variety of cyclic and acyclic alkenes and alkadienes to give new mono- and disubstituted as well as bicyclic dialkylcyclopropylamines (Tables 1-3) in yields ranging from 18 to 90% (in most cases around 55%). 3-Benzyl-6-(N,N-dibenzylamino)-3-azabicyclo[3.1.0]hexane (10a) and the orthogonally bisprotected 3-tert-butoxycarbonyl-6-(N,N-dibenzyl)- 3-azabicyclo[3.1.0]hexane (10d) as well as the analogous 6-(N,N-dibenzylamino)bicyclo[3.1.0]hexane (12) were obtained as pure exo diastereomers in particularly high yields (87, 90, and 88%, respectively) from N-benzylpyrroline (15a), N-Boc-pyrroline (15d; Boc = tert-butyloxycarbonyl) and cyclopentene (19). 1,3-Butadiene (52) and substituted 1,3-butadienes were also aminocyclopropanated quite well to give 2-ethenylcyclopropylamines in good yields (51-64%). Except for alkenyl and aryl-substituted compounds, N,N-dibenzylcyclopropylamines can be debenzylated by catalytic hydrogenation to the primary cyclopropylamines as demonstrated for 10a and 10d to yield the fully deprotected 10e (93%) and mono-Boc-protected 10f (98%), respectively. The latter are interesting templates for combinatorial syntheses of libraries of small molecules with a well defined distance of 4.3 A between two nitrogen atoms.
Reductive decyanation of N-protected 6-amino-3-aza-bicyclo [3.1.0]hexanecarbonitriles
Vilsmaier, Elmar,Milch, Gunther,Bergstraesser, Uwe
, p. 6403 - 6414 (2007/10/03)
The cyano moiety in dibenzylamino-3-azabicyclo[3.1.0]hexane-6- carbonitriles 14c,d can be removed reductively by alkali metals: sodium in liquid ammonia at low temperatures causes a reaction with retention of configuration whilst lithium in an ethylamine - ammonia mixture at 0°C leads predominantly to inversion of configuration. The analogous diallylamino species 14e is less suitable for reductive decyanation. It can be used, however, for the synthesis of a 3-azabicyclo[3.2.0]heptane diamine 22. The solid state conformation of an N(3)-unsubstituted 3-azabicyclohexane skeleton is determined by an X-ray structural analysis.
