[EN] N-UREIDOALKYL-AMINO COMPOUNDS AS MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY [FR] COMPOSES DE N-UREIDOALKYL-AMINO EN TANT QUE MODULATEURS DE L'ACTIVITE DE RECEPTEURS DE LA CHIMIOKINE
Concise Enantioselective Synthesis of Oxygenated Steroids via Sequential Copper(II)-Catalyzed Michael Addition/Intramolecular Aldol Cyclization Reactions
作者:Nathan R. Cichowicz、Will Kaplan、Yaroslav Khomutnyk、Bijay Bhattarai、Zhankui Sun、Pavel Nagorny
DOI:10.1021/jacs.5b08528
日期:2015.11.18
functionalized oxygenated steroids is described. This strategy is based on chiral bis(oxazoline) copper(II) complex-catalyzed enantioselective and diastereoselective Michael reactions of cyclic ketoesters and enones to install vicinal quaternary and tertiary stereocenters. In addition, the utility of copper(II) salts as highly active catalysts for the Michael reactions of traditionally unreactive β,β'-enones
Enantioselective Total Synthesis of Cannogenol-3-<i>O</i>-α-<scp>l</scp>-rhamnoside via Sequential Cu(II)-Catalyzed Michael Addition/Intramolecular Aldol Cyclization Reactions
作者:Bijay Bhattarai、Pavel Nagorny
DOI:10.1021/acs.orglett.7b03513
日期:2018.1.5
A concise and scalable enantioselective total synthesis of the natural cardenolides cannogenol and cannogenol-3-O-α-l-rhamnoside has been achieved in 18 linear steps. The synthesis features a Cu(II)-catalyzed enantioselective and diastereoselective Michael reaction/tandem aldol cyclization and a one-pot reduction/transposition, which resulted in a rapid (6 linear steps) assembly of a functionalized
Zeolites, an environmentally attractive solid catalyst, proves to be an efficient catalyst for Michael addition of several 1, 3-dicarbonyl compounds and thiols as donors with methyl vinyl ketone, acrolein and methyl acrylate as acceptors without any solvent are described.
Profiling the reactivity of cyclic C-nucleophiles towards electrophilic sulfur in cysteine sulfenic acid
作者:Vinayak Gupta、Kate S. Carroll
DOI:10.1039/c5sc02569a
日期:——
Oxidation of a protein cysteine thiol to sulfenic acid, termedS-sulfenylation, is a reversible post-translational modification that plays a crucial role in regulating protein function and is correlated with disease states.
N-ureidoalkyl-piperidines as modulators of chemokine receptor activity
申请人:——
公开号:US20040259914A1
公开(公告)日:2004-12-23
The present application describes modulators of chemokine receptor activity of formula (I):
1
or pharmaceutically acceptable salt forms thereof, useful for the prevention of asthma and other allergic diseases, as well as autoimmune pathologies such as rheumatoid arthritis and atherosclerosis, including methods of preparing and intermediates thereof.