Iodine(III)-Mediated, Controlled Di- or Monoiodination of Phenols
作者:Yuvraj Satkar、Luisa F. Yera-Ledesma、Narendra Mali、Dipak Patil、Pedro Navarro-Santos、Luis A. Segura-Quezada、Perla I. Ramírez-Morales、César R. Solorio-Alvarado
DOI:10.1021/acs.joc.9b00161
日期:2019.4.5
An oxidative procedure for the electrophilic iodination of phenols was developed by using iodosylbenzene as a nontoxic iodine(III)-based oxidant and ammonium iodide as a cheap iodine atom source. A totally controlled monoiodination was achieved by buffering the reaction medium with K3PO4. This protocol proceeds with short reaction times, at mild temperatures, in an open flask, and generally with high
通过使用碘基苯作为无毒的碘(III)基氧化剂和碘化铵作为廉价的碘原子源,开发了一种用于亲电子碘化苯酚的氧化方法。通过用K 3 PO 4缓冲反应介质来实现完全受控的单碘化。在温和的温度下,在开放的烧瓶中,该方案以较短的反应时间进行,并且通常收率很高。用富电子和贫电子的酚以及杂环探索了革兰氏反应以及该方案的范围。量子化学计算显示,PhII(OH)·NH 3是最可能的碘化活性物质,呈反应性“ I +synthon。鉴于碘代芳烃部分的相关性,我们在本文中提出了实用,有效和简单的方法,其具有允许进入碘代芳烃核心单元的宽泛的官能团范围。
Total Synthesis of Anti-HIV Agent Chloropeptin I
作者:Hongbo Deng、Jae-Kyung Jung、Tao Liu、Kevin W. Kuntz、Marc L. Snapper、Amir H. Hoveyda
DOI:10.1021/ja030249r
日期:2003.7.1
A convergent diastereo- and enantioselective totalsynthesis of anti-HIV agent chloropeptin I is reported. Important features of the totalsynthesis include: (1) the use of Ti-catalyzed cyanide addition to imines to prepare a requisite amino acid moiety, (2) the discovery of the positive effect of MeOH in the Cu-mediated biaryl ether formation to afford one of the two macrocyclic peptide moieties,
报道了抗 HIV 试剂氯肽素 I 的会聚非对映选择性和对映选择性全合成。全合成的重要特征包括:(1) 使用 Ti 催化氰化物加成到亚胺来制备必需的氨基酸部分,(2) 发现 MeOH 在 Cu 介导的联芳醚形成中的积极作用,以提供两个大环肽部分中的一个,以及 (3) 发现可力丁在非对映选择性 Pd 介导的交叉偶联中的积极影响,导致在这个具有重要医学意义的分子内有效形成另一个大环。这一关键步骤是在四种未受保护的酚存在下进行的,其中两种位于二氯苯基甘氨酸上。
3-Aryltetronic Acids: Efficient Preparation and Use as Precursors for Vulpinic Acids
作者:Aurélie Mallinger、Thierry Le Gall、Charles Mioskowski
DOI:10.1021/jo802038z
日期:2009.2.6
3-Aryltetronic acids were prepared in one step by treatment of a mixture of methyl arylacetates and methyl hydroxyacetates with potassium tert-butoxide, via tandem transesterification/Dieckmann condensation. Several mushroom or lichenpigments, vulpinic acids, were synthesized from 3-(4-methoxyphenyl)tetronic acid in three steps involving the reaction of the corresponding dianion with an α-ketoester
[EN] ANDROGEN RECEPTOR MODULATORS AND METHODS FOR THEIR USE<br/>[FR] MODULATEURS DU RÉCEPTEUR DES ANDROGÈNES ET LEURS PROCÉDÉS D'UTILISATION
申请人:ESSA PHARMA INC
公开号:WO2019226991A1
公开(公告)日:2019-11-28
Compounds having a structure of formula (I), (I-A), (Ia)-(Ie), (A)-(E), and (II) or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof are provided. Uses of such compounds for modulating androgen receptor activity, imaging diagnostics in cancer and therapeutics, and methods for treatment of disorders including prostate cancer are also provided.
Iodination of Activated Aromatic Compounds Using Nanostructure Solid Acid Catalyst
作者:Abolfazl Hosseini、Mohammad A. Khalilzadeh、Hoda Keipour、Mahmood Tajbakhsh
DOI:10.1080/00397911.2011.558967
日期:2012.8.15
Abstract Nanoporous silica anchored with sulfonic acid groups effectively catalyzes the iodination of aromatic compounds. The reaction was performed in water using hydrogen peroxide as oxidant. The recyclability of catalyst in green media significantly contributes to the environmental friendliness of the procedure. GRAPHICAL ABSTRACT