The Asymmetric Synthesis of Amines via Nickel-Catalyzed Enantioconvergent Substitution Reactions
作者:Ze-Peng Yang、Dylan J. Freas、Gregory C. Fu
DOI:10.1021/jacs.0c13034
日期:2021.2.24
dialkyl carbinamines do not provide general access to amines wherein the two alkyl groups are of similar size (e.g., CH2R versus CH2R1). Herein, we report two mild methods for the catalytic enantioconvergent synthesis of protected dialkyl carbinamines, both of which use a chiral nickel catalyst to couple an alkylzinc reagent (1.1–1.2 equiv) with a racemic partner, specifically, an α-phthalimido alkyl chloride
手性二烷基卡宾胺在有机化学、药物化学和生物化学等领域具有重要意义,例如用作生物活性分子、手性配体和手性催化剂。不幸的是,大多数用于合成二烷基卡宾胺的催化不对称方法不提供获得其中两个烷基具有相似大小的胺的一般途径(例如,CH 2 R与CH 2 R 1 )。在此,我们报道了两种催化对映异构合成受保护的二烷基卡宾胺的温和方法,这两种方法都使用手性镍催化剂将烷基锌试剂(1.1-1.2当量)与外消旋伙伴偶联,特别是α-邻苯二甲酰亚氨基烷基氯或受保护的 α-氨基酸的N-羟基邻苯二甲酰亚胺 (NHP) 酯。该方法用途广泛,可提供带有一系列官能团的二烷基卡宾胺衍生物。对于NHP酯的偶联,我们进一步描述了一种一锅变体,其中NHP酯原位生成,允许从市售氨基酸衍生物一步生成对映体富集的受保护的二烷基卡宾胺;我们通过将其应用于一系列有趣的目标分子的有效催化对映选择性合成来证明该方法的实用性。
[EN] PROCESS FOR THE PREPARATION OF IODIDES<br/>[FR] PROCÉDÉ DE PRÉPARATION D'IODURES
申请人:TECHNION R & D FOUNDATION LTD
公开号:WO2011154953A1
公开(公告)日:2011-12-15
This invention is directed to a process for the preparation of high yield alkyl or aryl iodide from its corresponding carboxylic acid using N-iodo amides.
这项发明涉及利用N-碘酰胺从相应的羧酸制备高产量的烷基或芳基碘化物的过程。
Catalyst-controlled doubly enantioconvergent coupling of racemic alkyl nucleophiles and electrophiles
作者:Haohua Huo、Bradley J. Gorsline、Gregory C. Fu
DOI:10.1126/science.aaz3855
日期:2020.1.31
stereochemistry when beginning with readily available racemic starting materials (racemicproducts). Here, we report a chiral nickel catalyst that couples racemic electrophiles (propargylic halides) with racemic nucleophiles (β-zincated amides) to form carbon-carbon bonds in doubly stereoconvergent processes, affording a single stereoisomer of the product from two stereochemical mixtures of reactants.
Transition-Metal-Free Borylation of Alkyl Iodides via a Radical Mechanism
作者:Qianyi Liu、Junting Hong、Beiqi Sun、Guangcan Bai、Feng Li、Guoquan Liu、Yang Yang、Fanyang Mo
DOI:10.1021/acs.orglett.9b01951
日期:2019.9.6
transition-metal-free borylation of alkyliodides. This method uses commercially available diboron reagents as the boron source and exhibits excellent functional group compatibility. Furthermore, a diverse range of primary and secondaryalkyliodides could be effectively transformed to the corresponding alkylboronates in excellent yield. Mechanisticinvestigations suggest that this borylation reaction
[EN] BETA-LACTAMASE INHIBITORS<br/>[FR] INHIBITEURS DE BÊTA-LACTAMASES
申请人:VENATORX PHARMACEUTICALS INC
公开号:WO2017100537A1
公开(公告)日:2017-06-15
Described herein are compounds and compositions that modulate the activity of beta-lactamases. In some embodiments, the compounds described herein inhibit beta-lactamase. In certain embodiments, the compounds described herein are useful in the treatment of bacterial infections.