Construction of 2-Substituted-3-Functionalized Benzofurans via Intramolecular Heck Coupling: Application to Enantioselective Total Synthesis of Daphnodorin B
A novel approach was developed for the synthesis of 2-substituted-3-functionalized benzofurans, using an intramolecular Heckreaction which was further applied in the first enantioselectivetotalsynthesis of Daphnodorin B.
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。
Pd-Catalyzed <i>ipso</i>,<i>meta</i>-Dimethylation of <i>ortho</i>-Substituted Iodoarenes via a Base-Controlled C–H Activation Cascade with Dimethyl Carbonate as the Methyl Source
作者:Zhuo Wu、Feng Wei、Bin Wan、Yanghui Zhang
DOI:10.1021/jacs.0c13057
日期:2021.3.31
the ipso- and meta-positions of the iodo group, which represents a novel strategy for meta-C–H methylation. With KOAc as the base, subsequent oxidative C(sp3)–H/C(sp3)–H coupling occurs; in this case, the overall transformation achieves triple C–H activation to form three new C–C bonds. These reactions allow expedient access to 2,6-dimethylated phenols, 2,3-dihydrobenzofurans, and indanes, which are ubiquitous
Starting from diverse alkene-tethered aryl iodides and O-benzoyl-hydroxylamines, the enantioselective reductive cross-electrophilic 1,2-carboamination of unactivatedalkenes was achieved using a chiral pyrox/nickel complex as the catalyst. This mild, modular, and practical protocol provides rapid access to a variety of β-chiral amines with an enantioenriched aryl-substituted quaternary carbon center
[EN] INDOLE-DERIVATIVE MODULATORS OF STEROID HORMONE NUCLEAR RECEPTORS<br/>[FR] MODULATEURS A BASE DE DERIVES INDOLIQUES DES RECEPTEURS NUCLEAIRES DES HORMONES STEROIDES
申请人:LILLY CO ELI
公开号:WO2004067529A1
公开(公告)日:2004-08-12
The present invention provides a compound of formula I or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising an effective amount of a compound of Formula I in combination with a suitable carrier, diluent, or excipient, and methods for treating physiological disorders, particularly congestive heart disease, comprising administering to a patient in thereof an effective amount of a compound of Formula I.