H5CoW12O40 supported on nano silica from rice husk ash: A green bifunctional catalyst for the reaction of alcohols with cyclic and acyclic 1,3-dicarbonyl compounds
abundant agricultural by-product. The present research work deals with the production of nanosilica powders, with high surface area and in amorphous form, from RHA using optimized technique. 12-Tungestocobaltic acid, H5CoW12O40 (CoW), was supported on silica from RHA to produce silica supported CoW (CoW/NSiO2) as a nano catalyst. The characterization data derived from FT-IR reveal that the Keggin structure
Five Roads That Converge at the Cyclic Peroxy-Criegee Intermediates: BF<sub>3</sub>-Catalyzed Synthesis of β-Hydroperoxy-β-peroxylactones
作者:Vera A. Vil’、Gabriel dos Passos Gomes、Maria V. Ekimova、Konstantin A. Lyssenko、Mikhail A. Syroeshkin、Gennady I. Nikishin、Igor V. Alabugin、Alexander O. Terent’ev
DOI:10.1021/acs.joc.8b02218
日期:2018.11.2
actones from silyl enol ethers, enolacetates, and cyclic acetals confirm that the β-peroxylactones indeed correspond to a deep energy minimum that connects a variety of the interconverting oxygen-rich species at this combined potential energy surface. The target β-hydroperoxy-β-peroxylactones were synthesized from β-ketoesters, and their silyl enol ethers, alkyl enol ethers, enolacetates, and cyclic
[EN] 7-HYDROXY-PYRAZOLO[1,5-A] PYRIMIDINE COMPOUNDS AND THEIR USE AS CCR2 RECEPTOR ANTAGONISTS<br/>[FR] COMPOSÉS 7-HYDROXY-PYRAZOLO-[1,5-A] PYRIMIDINE ET LEUR UTILISATION COMME ANTAGONISTES DU RÉCEPTEUR CCR2
申请人:PROXIMAGEN LTD
公开号:WO2012041817A1
公开(公告)日:2012-04-05
The compounds of formula (I) are antagonists of the CCR2 receptor Wherein R1-7 and A are as defined in the claims.
式(I)的化合物是CCR2受体的拮抗剂,其中R1-7和A如权利要求中所定义。
7-HYDROXY-PYRAZOLO[1,5-A] PYRIMIDINE COMPOUNDS AND THEIR USE AS CCR2 RECEPTOR ANTAGONISTS
申请人:Boyd Joe William
公开号:US20130252951A1
公开(公告)日:2013-09-26
The compounds of formula (I) are antagonists of the CCR2 receptor Wherein R
1-7
and A are as defined in the claims.
式(I)的化合物是CCR2受体的拮抗剂,其中R1-7和A如权利要求中所定义。
Different products in the reaction of the alcohols with cyclic and acyclic 1,3-dicarbonyl compounds: K5CoW12O40 as an electron transfer nano catalyst
benzylation of 1,3-dicarbonylcompounds. β-Keto enol ethers were obtained when cyclic1,3-dicarbonylcompounds used in this conditions instead of linear ones. The present methodology offers a practical, simple, mild, environmentally friendly, and time-saving method for etherification. Very low loading of catalyst, ease of workup, ease of handling, and reusability of catalyst are other advantages of