Baeyer–Villiger Oxidations in Ionic Liquids. A Facile Conversion of Ketones to Esters and Lactones
作者:J. S. Yadav、B. V. S. Reddy、A. K. Basak、A. V. Narsaiah
DOI:10.1246/cl.2004.248
日期:2004.3
cyclic and acyclic ketones underwent readily oxidation with m-chloroperbenzoic acid (m-CPBA) in ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate [bmim]BF 4 to afford esters/lactones with high selectivity, ease of product separation and in excellent chemical yields. The reaction proceeded smoothly in ionic liquid without the need of any additional acid or base catalyst. The ketones show enhanced
[EN] SHORT-CHAIN FATTY ACID HEXOSAMINE ANALOGS AND THEIR USE IN TISSUE ENGINEERING APPLICATIONS<br/>[FR] ANALOGUES HEXOSAMINE ACIDE GRAS À CHAÎNE COURTE ET LEUR UTILISATION DANS DES APPLICATIONS EN GÉNIE TISSULAIRE
申请人:UNIV JOHNS HOPKINS
公开号:WO2014164723A1
公开(公告)日:2014-10-09
A new class of molecules, C1-OH tributanoylated hexosamines, including, for example, Ga1NAc, G1cNAc and ManNAc, are demonstrated to increase cartilage-like tissue accumulation by IL- 1β-stimulated chondrocytes. Furthermore, all three molecules reduced NFKB1 and ΙκΒα driven gene expression, consistent with NFκB inhibitory properties of these analogs. Ga1NAc-a exposure produced the greatest ECM accumulation by IL-Ιβ- stimulated chondrocytes. However, Ga1NAc-a exposure produced an opposite effect on MSC exposure, where a decrease in ECM accumulation was observed. These findings are in support of the function of NFκB signaling during limb development and growth plate chondrogenesis. The present invention shows the capability of this new class of hexosamine analogs as disease-modifying agents for treating cartilage damage.
The present invention provides transient receptor potential vanilloid (TRPV) modulators of formula (I). In particular, compounds described herein are useful for treating or preventing diseases, conditions and/or disorders modulated by TRPV3. Also provided herein are processes for preparing compounds described herein, intermediates used in their synthesis, pharmaceutical compositions thereof, and methods for treating or preventing diseases, conditions and/or disorders modulated by TRPV3.
OPTICAL RECORDING MEDIUM AND COMPOUND USED FOR THE SAME
申请人:SHIOZAKI Hiroyoshi
公开号:US20090306376A1
公开(公告)日:2009-12-10
A compound comprising a ring structure including a ring composed of four carbon atoms and two nitrogen atoms and a substituted or unsubstituted amino group bonded to the ring structure.
A new heterogeneous hybrid ruthenium catalyst being an eco-friendly option for the production of polymers and organic intermediates
作者:Bob De Clercq、Fr??d??ric Lefebvre、Francis Verpoort
DOI:10.1039/b202872g
日期:2002.8.22
We succeeded in synthesising and characterising a new heterogeneous hybrid ruthenium catalyst that exhibits excellent stability, reusability and leaching characteristics. The host–guest interaction is studied by XRD, XRF, ICP/MS, BET, FT-Raman and solid state NMR analysis. Moreover, we tested this catalytic system in ring-closing metathesis (RCM), ring-opening metathesis polymerization (ROMP), Kharasch addition, atom transfer radical polymerization (ATRP) and vinylation reactions. The results obtained from these tests show that for ROMP, RCM, Kharasch addition and vinylation reactions the heterogeneous catalyst possesses important advantages in comparison with its homogeneous analogue.