[EN] THIAZINE AND OXAZINE DERIVATIVES AS MMP-13 INHIBITORS FOR TREATING ARTHRITIS [FR] DERIVES DE THIAZINE ET D'OXAZINE UTILISES EN TANT QU'INHIBITEURS MMP-13 POUR TRAITER L'ARTHRITE
An efficient total synthesis of rhein and diacerhein has been accomplished by relying on a remarkable regioselective directedorthometalation (DOM) followed by a one-pot two step addition-cyclization reaction, generating phthalide 5 intermediate efficiently.
Poly(ethylene glycol)-Supported Nitroxyls: Branched Catalysts for the Selective Oxidation of Alcohols
作者:Pedro Ferreira、Emyr Phillips、David Rippon、Shik Chi Tsang、Wayne Hayes
DOI:10.1021/jo0490494
日期:2004.10.1
e-1-oxyl (TEMPO) are highly selective oxidation catalysts for the conversion of primary alcohols into the corresponding aldehydes. In this study, direct tethering of TEMPO units onto linear poly(ethylene glycol) (PEG) has afforded macromolecular catalysts that exhibit solubility in both aqueous and organic solvents. Recovery of the dissolved polymer-supported catalyst has been carried out by precipitation
A series of polymer‐supported chiral β‐hydroxy amides and C2‐symmetric β‐hydroxy amides have been synthesized and successfully used for the enantioselective addition of phenylacetylene to aldehydes. High yields (up to 93%) and enantioselectivities (up to 92% ee) were achieved by using polymer‐supported chiral β‐hydroxy amide 4b. The resin 4b is reused four times, giving the product with enantioselectivity
Anion induced and inhibited circumrotation of a [2]catenane
作者:Ka-Yuen Ng、Vitor Felix、Sérgio M. Santos、Nicholas H. Rees、Paul D. Beer
DOI:10.1039/b719304a
日期:——
The first example of a catenane capable of performing circumrotation via an anion switching methodology is described; of particular interest is a conformational locking mechanism which results from chloride coordination in the catenane binding cavity.
PHOTOLYTIC ACID-GENERATING POLYMERS AND MONOMERS FOR THEIR CONSTRUCTION
申请人:BRAINARD Robert L.
公开号:US20110130538A1
公开(公告)日:2011-06-02
Polymers for photoresists and monomers for incorporation into those polymers are disclosed. The polymers comprise a photoacid generator (PAG) component and at least a second component that is photolytically stable and acid-stable. The polymers may also contain a third, acid-labile component. The photoacid generator is based on N-sulfoxyimides and related moieties that contain photolabile oxygen-heteroatom and oxygen-aromatic carbon bonds.