The first example of sole direct C–H bond arylation of benzo[b]furans with aryl chlorides was achieved catalyzed by a well-defined NHC-Pd(II)-Im complex. Under the suitable conditions, all reactions involving kinds of benzo[b]furans and (hetero)aryl chlorides proceeded well to give the desired C2-arylated benzo[b]furans in sole regioselectivity in acceptable to high yields, providing an efficient and
明确定义的NHC-Pd(II)-Im络合物催化了苯并[ b ]呋喃与芳基氯的唯一直接C-H键芳基化反应。在合适的条件下,所有涉及各种苯并[ b ]呋喃和(杂)芳基氯化物的反应均能顺利进行,从而以唯一的区域选择性提供所需的C2-芳基化苯并[ b ]呋喃,并以高收率接受,从而提供了有效而经济的途径用于苯并[ b ]呋喃的直接C2-H键芳基化。
Highly asymmetric synthesis of (+)-corsifuran A. Elucidation of the electronic requirements in the Ruthenium–NHC catalyzed hydrogenation of benzofurans
synthesis of ent-corsifuran A by a highlyasymmetrichydrogenation of a benzofuran precursor is reported. In addition, the electronic influence of the substituents on the asymmetrichydrogenation of benzofurans is provided. Whereas the hydrogenation of electron-deficient benzofurans was achieved under very mild conditions, the presence of electron-donating groups in the benzofuran required harsher reaction
PHARMACEUTICAL COMPOSITIONS AND METHODS OF PREVENTING, TREATING, OR INHIBITING INFLAMMATORY DISEASES, DISORDERS, OR CONDITIONS OF THE SKIN, AND DISEASES, DISORDERS, OR CONDITIONS ASSOCIATED WITH COLLAGEN DEPLETION
申请人:CHANG Chien-Neng
公开号:US20090010884A1
公开(公告)日:2009-01-08
The present invention provides compositions and methods for preventing, treating, or inhibiting inflammatory diseases, disorders, or conditions of the skin, and diseases, disorders, or conditions associated with collagen depletion using one or more estrogenic agents.
Natural product inspired library synthesis - Identification of 2,3-diarylbenzofuran and 2,3-dihydrobenzofuran based inhibitors of Chlamydia trachomatis
作者:Michael Saleeb、Sergio Mojica、Anna U. Eriksson、C. David Andersson、Åsa Gylfe、Mikael Elofsson
DOI:10.1016/j.ejmech.2017.11.099
日期:2018.1
A natural product inspired library was synthesized based on 2,3-diarylbenzofuran and 2,3-diaryl-2,3-dihydrobenzofuran scaffolds. The library of forty-eight compounds was prepared by utilizing Pd-catalyzed one-pot multicomponent reactions and ruthenium-catalyzed intramolecular carbenoid C-H insertions. The compounds were evaluated for antibacterial activity in a panel of test systems including phenotypic
Synthesis of 2-Substituted Benzofurans and Indoles Using Functionalized Titanium Benzylidene Reagents on Solid Phase
作者:Calum Macleod、Gordon J. McKiernan、Emma J. Guthrie、Louis J. Farrugia、Dieter W. Hamprecht、Jackie Macritchie、Richard C. Hartley
DOI:10.1021/jo026384o
日期:2003.1.1
nitrogen nucleophile in the ortho position were generated from thioacetals, using low-valent titanocene complex, Cp2Ti[P(OEt)3]2. Methylene acetal, alkyl ether, silyl ether, fluoro, tertiary amino, and N-alkyl, N-benzyl, N-prenyl, and N-silyl tert-butyl carbamate groups were tolerated in the titanium alkylidene reagents (Schrock carbenes). Aryl-chlorine bonds were stable to the titanium benzylidene functionality