The invention is concerned with novel hexafluoroisopropanol substituted ether derivatives of formula (I):
wherein R
1
to R
3
are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. These compounds bind to LXR alpha and LXR beta and can be used as medicaments.
A broadly applicable and practical oligomeric (salen)Co catalyst for enantioselective epoxide ring-opening reactions
作者:David E. White、Pamela M. Tadross、Zhe Lu、Eric N. Jacobsen
DOI:10.1016/j.tet.2014.03.043
日期:2014.7
enhancements in reactivity and enantioselectivity relative to monomeric and other multimeric (salen) Co catalysts in a wide variety of enantioselective epoxide ring-opening reactions. The application of catalyst 4a is illustrated in the kinetic resolution of terminalepoxides by nucleophilic ring-opening with water, phenols, and primary alcohols; the desymmetrization of meso epoxides by addition of
A conceptually new regioselective and highly syn-stereoselective intermolecular Friedel–Crafts-type O-alkylation of phenols with aryl epoxides by the use of appropriately substituted aryl borates is reported. The carbon–carbon bond formation occurs in neutral and mild conditions without the need for external Lewis acids or transition metal catalysts.
Highly Regioselective Ring Opening of Epoxides with Polymer Supported Phenoxide and Naphthoxide Anions
作者:B. Tamami、N. Iranpoor、R. Rezaei
DOI:10.1081/scc-200026220
日期:2004.1
Abstract Amberlite IRA‐400 supported phenoxide and naphthoxide anions are easily prepared. These polymer supported reagents that are highly air stable are used for the regioselective ringopening reactions of different epoxides to give aryl ether alcohols in high yields under mild reaction conditions.
An efficient catalyst for ring opening of epoxides with phenol and thiophenol under solvent-free conditions
作者:Hong-fei Lu、Jun-tao Zhou、He-long Cheng、Lei-lei Sun、Fei-fei Yang、Run-ze Wu、Yu-hua Gao、Zhi-bin Luo
DOI:10.1016/j.tet.2013.10.098
日期:2013.12
An efficient and rapid procedure for ring opening reaction of various epoxides with phenol and thiophenol derivatives was developed. The procedure can be obtained at room temperature under solvent-free condition in presence of (C4H12N2)(2)[Bicl(6)]Cl center dot H2O (1 mol %). This catalyst can be reused several times without significant loss of activity. (C) 2013 Elsevier Ltd. All rights reserved.