Alpha,beta-unsaturated esters and acids by stereoselective dehydration
申请人:Deng Xiaohu
公开号:US20060004195A1
公开(公告)日:2006-01-05
There are provided by the present invention certain pyrazole based CCK-1 receptor modulators which have the general formula:
wherein Ar is an aromatic or heteroaromatic group, X is a hydrocarbon linker, Y is a bond or hydrocarbon linker and R
1
, R
2
, R
3
, R
4
and R
5
are certain organic substituents, methods for making the same, and stereoselective dehydration methods for generally making α,β-unsaturated esters, acids and their derivatives.
[EN] CCK-1 RECEPTOR MODULATORS<br/>[FR] MODULATEURS DU RECEPTEUR DE CCK-1
申请人:JANSSEN PHARMACEUTICA NV
公开号:WO2004007463A1
公开(公告)日:2004-01-22
There are provided by the present invention certain pyrazole based CCK-1 receptor modulators.
本发明提供了一些基于吡唑的CCK-1受体调节剂。
[EN] PROCESS FOR THE REACTIVE EXTRACTION OF LEVULINIC ACID<br/>[FR] PROCEDE POUR L'EXTRACTION REACTIVE D'ACIDE LEVULINIQUE
申请人:SHELL INT RESEARCH
公开号:WO2005070867A1
公开(公告)日:2005-08-04
A process for the reactive extraction of levulinic acid from an aqueous mixture comprising levulinic acid, wherein the aqueous mixture is contacted with a liquid esterifying alcohol, which alcohol has at least four carbon atoms and is substantially water-immiscible, at esterification conditions in the presence of a catalyst at a temperature in the range of from 50 to 250 °C, to form a levulinate ester, wherein the amount of alcohol is such that the liquid alcohol extracts the ester from the aqueous mixture and an aqueous phase comprising the catalyst and having a reduced levulinic acid content and an organic phase comprising alcohol and levulinate ester is formed.
There are provided by the present invention certain pyrazole based CCK-1 receptor modulators.
本发明提供了某些基于吡唑的CCK-1受体调节剂。
Process for the reactive extractive extraction of levulinic acid
申请人:Ayoub Marie Paul
公开号:US20060047139A1
公开(公告)日:2006-03-02
A process for the reactive extraction of levulinic acid from an aqueous mixture having levulinic acid, wherein the aqueous mixture is contacted with a liquid esterifying alcohol, the alcohol having at least four carbon atoms and is substantially water-immiscible, at esterification conditions in the presence of a catalyst to form a levulinate ester, wherein the amount of the alcohol is such that the alcohol extracts the levulinate ester from the aqueous mixture. Further, an aqueous phase, having the catalyst and a reduced levulinic acid content, and an organic phase, having the alcohol and the levulinate ester, are formed.