with 2 equiv of aryl Grignardreagents, were found to be effective active catalysts in cross-coupling reactions of vinyl ethers with aryl Grignardreagents, giving rise to the production of vinyl arenes. In this catalytic system, vinyl-O bonds were preferably cleaved over Ar-O or Ar-Br bonds. A lithium rhodate complex was isolated, and its crystalstructure was determined by X-ray crystallography.
通过 [RhCl(cod)]2 与 2 当量的芳基格氏试剂反应生成的阴离子二芳基铑配合物被发现是乙烯基醚与芳基格氏试剂交叉偶联反应的有效活性催化剂,从而产生乙烯基芳烃. 在该催化系统中,乙烯基-O键优选在Ar-O或Ar-Br键上裂解。分离出一种铑酸锂络合物,并通过 X 射线晶体学确定其晶体结构。
Iridium/Bipyridine-Catalyzed <i>ortho</i>-Selective C–H Borylation of Phenol and Aniline Derivatives
作者:Hong-Liang Li、Motomu Kanai、Yoichiro Kuninobu
DOI:10.1021/acs.orglett.7b02936
日期:2017.11.3
ortho-selective C–H borylation of phenol and anilinederivatives has been successfully developed. Iridium/bipyridine-catalyzed C–H borylation generally occurred at the meta- and para-positions of aromatic substrates. Introduction of an electron-withdrawing substituent on the bipyridine-type ligand and a methylthiomethyl group on the hydroxy and amino groups of the phenol and aniline substrates, however, dramatically
A Convenient Preparation of n-Butyl Chloromethyl Ether and Its Use in<u>Ortho</u>-Directed Metalation of Phenols
作者:Javid H. Zaidi
DOI:10.1080/00397919608004551
日期:1996.6
Abstract A simple preparation of n-butyl chloromethylether is described which can be extended to other alkyl chloromethylethers. n-Butoxymethyl ether derived from n-butyl chloromethylether and phenol were used to assess the effectiveness of n-butoxymethyl group in ortho-metalation.
Fluorine in Drug Design: A Case Study with Fluoroanisoles
作者:Li Xing、David C. Blakemore、Arjun Narayanan、Ray Unwalla、Frank Lovering、R. Aldrin Denny、Huanyu Zhou、Mark E. Bunnage
DOI:10.1002/cmdc.201402555
日期:2015.4
Anisole and fluoroanisoles display distinct conformational preferences, as evident from a survey of their crystal structures. In addition to altering the free ligand conformation, various degrees of fluorination have a strong impact on physicochemical and pharmacokinetic properties. Analysis of anisole and fluoroanisole matched molecular pairs in the Pfizer corporate database reveals interesting trends:
RIBOSOME STRUCTURE AND PROTEIN SYNTHESIS INHIBITORS
申请人:Steitz A. Thomas
公开号:US20050036997A1
公开(公告)日:2005-02-17
The invention provides methods for producing high resolution crystals of ribosomes and ribosomal subunits as well as crystals produced by such methods. The invention also provides high resolution structures of ribosomal subunits either alone or in combination with protein synthesis inhibitors. The invention provides methods for identifying ribosome-related ligands and methods for designing ligands with specific ribosome-binding properties as well as ligands that may act as protein synthesis inhibitors. Thus, the methods and compositions of the invention may be used to produce ligands that are designed to specifically kill or inhibit the growth of any target organism.