A yet-unexploited class of azomethine imines, C,N-cyclic azomethine imines, could be successfully employed in highly enantioselective1,3-dipolarcycloaddition with enals catalyzed by titanium-BINOLate to give pharmaceutically attractive tetrahydroisoquinoline and piperidine motifs.
Copper-Catalyzed Enantioselective Additions to Oxocarbenium Ions: Alkynylation of Isochroman Acetals
作者:Prantik Maity、Harathi D. Srinivas、Mary P. Watson
DOI:10.1021/ja207585p
日期:2011.11.2
developed an enantioselective, copper(I)-catalyzed addition of terminal alkynes to racemic isochroman acetals. This method is one of the first transition-metal-catalyzed approaches to enantioselective additions to prochiral oxocarbeniumions. In this reaction, TMSOTf is used to form the oxocarbeniumion in situ under conditions compatible with simultaneous formation of the chiral copper acetylide. By
[EN] GLUCOCORTICOID-SELECTIVE ANTI-INFLAMMATORY AGENTS<br/>[FR] AGENTS ANTI-INFLAMMATOIRES PRESENTANT UNE SELECTIVITE POUR LES GLUCOCORTICOIDES
申请人:ABBOTT LABORATORIES
公开号:WO1999041256A1
公开(公告)日:1999-08-19
(EN) Compounds having Formula (I), are useful for partially or fully antagonizing, repressing, agonizing, or modulating the glucocorticoid receptor and treating immune, autoimmune and inflammatory diseases in a mammal. Also disclosed are pharmaceutical compositions comprising compounds of Formula (I) and methods of inhibiting immune or autoimmune diseases in a mammal.(FR) Composés représentés par la formule (I) jouant un rôle utile partiel ou total d'antagonistes, de répresseurs, d'agonistes ou de modulateurs du récepteur de glucocorticoïdes et servant à traiter des maladies immunes, auto-immunes et inflammatoires chez le mammifère. Compositions pharmaceutiques contenant les composés ci-dessus et procédés permettant d'inhiber des maladies immunes ou auto-immunes chez le mammifère.
Isochromanone is the core structure of many bioactive compounds. Direct oxidation of isochromans is one of leading methods for the construction of isochromanones, while most established processes remain suffering from the use of environmentally unfriendly metal oxidants, harsh reaction conditions, and the difficulty in catalyst recycling and product separation. Herein, we report a convenient, cost-effective
CuBr2 catalyzed bromination/oxidation of isochromans to benzaldehyde derivatives
作者:Mei-Yan Zhou、Shan-Shan Kong、Ling-Qiong Zhang、Ming Zhao、Jin-Ao Duan、Zhen Ou-yang、Min Wang
DOI:10.1016/j.tetlet.2013.05.078
日期:2013.7
A series of isochromans were oxidized and brominated by using 1.2 equiv of CuBr2 in CH3CN at reflux to give the corresponding bromo benzaldehydes in moderate yields. A plausible mechanism for this transformation has been suggested. (C) 2013 Elsevier Ltd. All rights reserved.