Cationic Gold- and Silver-Catalyzed Cycloisomerizations of Propargylic Ureas: A Selective Entry to Oxazolidin-2-imines and Imidazolidin-2-ones
作者:Olga P. Pereshivko、Vsevolod A. Peshkov、Jeroen Jacobs、Luc Van Meervelt、Erik V. Van der Eycken
DOI:10.1002/adsc.201200905
日期:2013.3.11
gold(I) catalysis generally resulted in a formation of oxazolidin‐2‐imines as major products while the application of silver(I) triflate selectively provided the corresponding imidazolidin‐2‐ones. An attempt to rationalize the observed chemoselectivity is described. The scope of both processes was demonstrated through the use of variously substituted secondary propargylic amines.
[EN] POLYSUBSTITUTED 2-AMINOIMIDAZOLES FOR CONTROLLING BIOFILMS AND PROCESS FOR THEIR PRODUCTION<br/>[FR] 2-AMINOIMIDAZOLES POLYSUBSTITUÉS DESTINÉS À LA LUTTE CONTRE LA FORMATION DE BIOFILMS ET LEUR PROCÉDÉ DE PRODUCTION
申请人:UNIV LEUVEN KATH
公开号:WO2012041934A1
公开(公告)日:2012-04-05
The present invention relates to compounds, compositions and methods for controlling and/or preventing biofilms and bacterial infections, being polysubstituted 2-amino-imidazoles with the structural formula (I). wherein R1 is H, an aliphatic group or a cycloaliphatic group; R2 is H, an aliphatic group or a cycloaliphatic group; R3 is an aliphatic group, a cycloaliphatic group, an aromatic group or a heterocyclic group; and R4 is an aliphatic group, a cycloaliphatic group, an aromatic group or a heterocyclic group; and pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomeric forms or polymorphic substances thereof.
Efficient Microwave-Assisted Synthesis of Secondary Alkylpropargylamines by Using A<sup>3</sup>-Coupling with Primary Aliphatic Amines
作者:Jitender B. Bariwal、Denis S. Ermolat'ev、Erik V. Van der Eycken
DOI:10.1002/chem.200903143
日期:2010.3.15
Three‐component coupling reaction: An efficient, microwave‐assisted, CuI‐catalysed A3‐coupling reaction with primaryaliphaticamines that gives access to secondary propargylamines is described (see scheme).
Concise and Diversity-Oriented Route toward Polysubstituted 2-Aminoimidazole Alkaloids and Their Analogues
作者:Denis S. Ermolat'ev、Jitender B. Bariwal、Hans P. L. Steenackers、Sigrid C. J. De Keersmaecker、Erik V. Van der Eycken
DOI:10.1002/anie.201004256
日期:2010.12.3
Alkaloids of the naamine family were synthesized from diverse propargylamines in just two steps (see scheme: R1=Me, R2=substituted benzyl, R3=Ar). Thus, the addition to a propargylamine of a carbodiimide generated in situ, silver(I)‐catalyzed intramolecular hydroamidation, and subsquent deprotection provide access to the heterocyclic core of numerous natural products and biologically active compounds