作者:Douglas C. Behenna、Justin T. Mohr、Nathaniel H. Sherden、Smaranda C. Marinescu、Andrew M. Harned、Kousuke Tani、Masaki Seto、Sandy Ma、Zoltán Novák、Michael R. Krout、Ryan M. McFadden、Jennifer L. Roizen、John A. Enquist、David E. White、Samantha R. Levine、Krastina V. Petrova、Akihiko Iwashita、Scott C. Virgil、Brian M. Stoltz
DOI:10.1002/chem.201003383
日期:2011.12.9
functions with nearly identical efficiency in terms of yield and enantioselectivity. Catalyst discovery and development, the optimization of reaction conditions, the exploration of reactionscope, and applications in target‐directed synthesis are reported. Experimental observations suggest that these alkylationreactions occur through an unusual inner‐sphere mechanism involving binding of the prochiral
3-amino-3-carbamoyloxyalkylacrylic acid intermediates to dihydropyridines
申请人:Banyu Pharmaceutical Co., Ltd.
公开号:US04739106A1
公开(公告)日:1988-04-19
A process for preparing a 2-carbamoyloxyalkyl-1,4-dihydropyridine derivative represented by the general formula: ##STR1## which comprises: (a) reacting a 3-amino-3-carbamoyloxyalkylacrylic acid derivative represented by the general formula: ##STR2## with a benzylidene compound represented by the general formula: ##STR3## (b) reacting the 3-amino-3-carbamoyloxyalkylacrylic acid derivative of the general formula II with an aldehyde compound represented by the general formula: ##STR4## and a .beta.-keto-ester compound represented by the general formula: R.sup.4 --CO--CH.sub.2 --COOR.sup.2 (V) (c) reacting a 3-carbamoyloxyalkylpropiolic acid derivative represented by the general formula: ##STR5## with the benzylidene compound of the general formula III and ammonia or its salt; or (d) reacting the 3-carbamoyloyalkylpropiolic acid derivative of the general formula VI with the aldehyde compound of the general formula IV, the .beta.-keto-ester compound of the general formula V and ammonia or its salt.
1,2,3-Triazole-gold(I)-triethylposphine derivatives active against resistant Gram-positive pathogens
作者:Mathieu Michaut、Alexandre Steffen、Jean-Marie Contreras、Christophe Morice、Isabelle J. Schalk、Patrick Plésiat、Gaëtan L.A. Mislin
DOI:10.1016/j.bmcl.2021.127879
日期:2021.5
Innovative organogold(I) antibacterial compounds were synthesized by click chemistry with triethylphosphine-gold(I) azides and an alkyne derivative. The resulting organo-gold(I) compounds exhibit high levels of antibacterial activity against Gram-positive pathogens, with particularly low MICs against Clostridium difficile.
Chemoenzymatic Synthesis of Unnatural Nucleotide Sugars for Enzymatic Bioorthogonal Labeling
作者:Liuqing Wen、Madhusudhan Reddy Gadi、Yuan Zheng、Christopher Gibbons、Shukkoor Muhammed Kondengaden、Jiabin Zhang、Peng George Wang
DOI:10.1021/acscatal.8b02081
日期:2018.8.3
advantage of relaxed donor specificity and strict acceptor specificity of glycosyltransferases to label target glycan epitopes with bioorthogonal reactivegroups carried by unnatural nucleotide sugars in vitro. The subsequent covalent conjugation by bioorthogonal chemical reactions with either fluorescent or affinity tags allows further visualization, quantification, or enrichment of target glycan epitopes
Synthesis of Supramolecular Iridium Catalysts and Their Use in Enantioselective Visible-Light-Induced Reactions
作者:Thorsten Bach、Alexander Böhm
DOI:10.1055/s-0035-1561378
日期:——
Iridiumcomplexes were prepared which are covalently linked via a bipyridine ligand to a chiral octahydro-1H-4,7-methanoisoindol-1-one skeleton. The skeleton allows for two-point hydrogen bonding to prochiral lactams, which can be processed in iridium-catalyzed photochemical reactions. Attempts to use the iridiumcomplexes in reactions, which typically involve photoinduced electron transfer, failed