Regio- and Enantioselective Iridium-Catalyzed Amination of Racemic Branched Alkyl-Substituted Allylic Acetates with Primary and Secondary Aromatic and Heteroaromatic Amines
作者:Seung Wook Kim、Leyah A. Schwartz、Jason R. Zbieg、Craig E. Stivala、Michael J. Krische
DOI:10.1021/jacs.8b12152
日期:2019.1.9
enantioselective Tsuji-Trost-type aminations of racemic branched alkyl-substituted allylic acetates using primary or secondary (hetero)aromatic amines. Specifically, in the presence of ( S)-Ir-II (5 mol%) in DME solvent at 60-70 °C, α-methyl allyl acetate 1a (100 mol%) reacts with primary (hetero)aromatic amines 2a-2l (200 mol%) or secondary (hetero)aromatic amines 3a-3l (200 mol%) to form the branched products
[EN] METHODS FOR SYNTHESIZING 2-SUBSTITUTED IMIDAZOLES<br/>[FR] METHODES DE SYNTHESE D'IMIDAZOLES 2-SUBSTITUES
申请人:SEPRACOR INC.
公开号:WO1998046571A1
公开(公告)日:1998-10-22
(EN) The present invention is a method of preparing 2-substituted imidazoles from readily available imidazoles having a leaving group in the 2-position, by alkylating the imidazole under mild conditions to afford a 3-$i(N)-alkylated imidazolium salt; and coupling the imidazolium salt with a nucleophile also under mild conditions to afford a 2-substituted 3-$i(N)-alkylated imidazolium salt. The reaction product can optionally be isolated and purified. The 2-substituted 3-$i(N)-alkylated imidazolium salt is hydrolyzed to afford a 2-substituted imidazole. Alternatively, the imidazole is coupled with a nucleophile in the presence of fluoride ion to provide a 2-substituted imidazole.(FR) La présente invention concerne une méthode de préparation d'imidazoles 2-substitués à partir d'imidazoles facilement disponibles possédant un groupe partant situé dans la position 2, par alkylation de l'imidazole dans des conditions modérées pour obtenir un sel d'imidazolium 3-$i(N)-alcoylé; puis par couplage du sel d'imidazolium avec un nucléophile également dans des conditions modérées pour obtenir un sel d'imidazolium 2-substitué 3-$i(N)-alcoylé. Le produit de réaction peut éventuellement être isolé ou purifié. Le sel d'imidazolium 2-substitué 3-$i(N)-alcoylé est hydrolysé pour produire un imidazole 2-substitué. Dans un autre mode de réalisation, l'imidazole est couplé à un nucléophile en présence d'un ion de fluorure pour produire un imidazole 2-substitué.
The present invention is a method of preparing 2-substituted imidazoles from readily available imidazoles having a leaving group in the 2-position, by alkylating the imidazole under mild conditions to afford a 3-N-alkylated imidazolium salt; and coupling the imidazolium salt with a nucleophile also under mild conditions to afford a 2-substituted 3-N-alkylated imidazolium salt. The reaction product can optionally be isolated and purified. The 2-substituted 3-N-alkylated imidazolium salt is hydrolyzed to afford a 2-substituted imidazole. Alternatively, the imidazole is coupled with a nucleophile in the presence of fluoride ion to provide a 2-substituted imidazole.
Imidazo[1,2-a]pyridines are disclosed. Compounds of the invention are useful therapeutic agents and their inclusion in pharmaceutical formulations and use in methods of treatment are disclosed.
The present invention relates to compounds of formula (I), or pharmaceutically acceptable derivatives thereof, useful in the treatment of CCR5-related diseases and disorders, for example, useful in the inhibition of HIV replication, the prevention or treatment of an HIV infection, and in the treatment of the resulting acquired immune deficiency syndrome (AIDS).