Process facilitating the regeneration of a catalyst based on a zeolite used in an acylation reaction, catalyst and use
申请人:——
公开号:US20020120169A1
公开(公告)日:2002-08-29
The present invention relates to a process facilitating the regeneration of a catalyst based on a zeolite, employed in an acylation reaction.
Another subject of the invention is a process for acylation of an aromatic ether, comprising, in a preferred alternative form, an additional stage of regeneration of the catalyst.
The process of the invention, which makes it possible to regenerate more easily a catalyst based on a zeolite, employed in an acylation reaction, is characterized in that the zeolite is modified by addition of an effective quantity of at least one metallic element M chosen from the elements of group 8 of the Periodic Classification of the elements.
Air- and Light-Stable <i>S</i>-(Difluoromethyl)sulfonium Salts: <i>C</i>-Selective Electrophilic Difluoromethylation of β-Ketoesters and Malonates
作者:Sheng-Le Lu、Xin Li、Wen-Bing Qin、Jian-Jian Liu、Yi-Yong Huang、Henry N. C. Wong、Guo-Kai Liu
DOI:10.1021/acs.orglett.8b03067
日期:2018.11.2
Air- and light-stable electrophilic difluoromethylating reagents, S-(difluoromethyl)-S-phenyl-S-(2,4,6-trialkoxyphenyl) sulfonium salts were successfully developed, and the introduction of intramolecular hydrogen bonds plays a crucial role for the stabilities and reactivities of these reagents. C-selective difluoromethylation of a broad range of β-ketoesters and malonates proceeded smoothly under mild
[EN] INTRODUCTION OF ALKYL SUBSTITUENTS TO AROMATIC COMPOUNDS<br/>[FR] INTRODUCTION DE SUBSTITUANTS ALKYLE DANS DES COMPOSÉS AROMATIQUES
申请人:B G NEGEV TECH AND APPLICATIONS LTD AT BEN-GURION UNIV
公开号:WO2016132355A1
公开(公告)日:2016-08-25
Novel selective synthesis route to introduce primary alkyl groups on aromatic compounds is disclosed. The synthesis route is based on electrophilic aromatic substitutions of thionium ion species that are generated in-situ from aldehydes and thiols, affording benzyl sulfide that can be reduced with triethylsilane.
NOVEL MULTIMERIC MOLECULES, A PROCESS FOR PREPARING THE SAME AND THE USE THEREOF FOR MANUFACTURING MEDICINAL DRUGS
申请人:Guichard Gilles
公开号:US20100136034A1
公开(公告)日:2010-06-03
The invention relates to a compound of the formula (I):
in which k and j are independently 0 or 1, Y is a macrocycle in which the cycle includes 9 to 36 carbon atoms and is functionalised by three amino functions and by a chain for attaching the spacer arm Z via an X bond, R
c
is a binding pattern with a receptor of the TNF superfamily, X is a chemical function for binding the Y group to the space arm, and Z is a bi-, tri- or tetra-functional spacer arm.
Multivalent indole compounds and use thereof as phospholipase-A2 inhibitors
申请人:Chang Han-Ting
公开号:US20070135385A1
公开(公告)日:2007-06-14
Indole and indole-related compounds, compositions and methods are disclosed. The compounds of the invention are useful as phospholipase inhibitors. The compounds and compositions of the invention are useful for treatment of phospholipase-related conditions, such as insulin-related, weight-related and/or cholesterol-related conditions in an animal subject.