Metal-Free C–O Bond Functionalization: Catalytic Intramolecular and Intermolecular Benzylation of Arenes
作者:Luis Bering、Kirujan Jeyakumar、Andrey P. Antonchick
DOI:10.1021/acs.orglett.8b01495
日期:2018.7.6
conditions enabled a catalytic and metal-free Friedel–Craftsalkylation reaction with benzylic alcohols, producing water as the stoichiometric byproduct. A comprehensive scope (>50 examples) for both approaches and application in drug synthesis were demonstrated. Mechanistic studies suggest a Lewis acid-based mechanism for the metal-free Friedel–Crafts reaction.
Developing benign syntheses using ion pairs <i>via</i> solvent-free mechanochemistry
作者:Lianna N. Ortiz-Trankina、Jazmine Crain、Carl Williams、James Mack
DOI:10.1039/d0gc01116a
日期:——
significance of ion pairing and the use of weak bases for driving forward nucleophilic substitution reactions. This approach takes advantage of the lack of solvent shells to incorporate weaker and safer bases to drive reactions to completion through specific ion pairing pathways. The most efficient reactions contained larger and more polarizable cation and anion pairs.
Copper-catalyzed oxidative aromatization of 2-cyclohexen-1-ones to phenols in the presence of catalytic hydrogen bromide under molecular oxygen
作者:Kotaro Kikushima、Yuta Nishina
DOI:10.1039/c3ra43071e
日期:——
Catalytic oxidative aromatization has been achieved using 2-cyclohexen-1-ones to obtain phenol derivatives in the presence of a catalytic amount of copper salt and aqueous HBr under molecular oxygen. The amount of HBr was successfully reduced to a catalytic quantity, and the other additive such as a ligand and an oxidant as well as inert conditions were unnecessary. Various mono-, di-, and trisubstituted
[EN] ARYLPYRAZOLE ETHERS AS INHIBITORS OF LEUKOTRIENE A4 HYDROLASE<br/>[FR] ÉTHERS D'ARYLPYRAZOLE EN TANT QU'INHIBITEURS DE LEUCOTRIÈNE A4 HYDROLASE
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2013012844A1
公开(公告)日:2013-01-24
The present invention relates to compounds of formula I or a pharmaceutically acceptable salt thereof, wherein A1, A2, A3, L1, L2 and D are as defined herein. The compounds of formula (I) are useful as inhibitors of leukotriene A4 hydrolase (LTA4H) and treating LTA4H related disorder. The present invention also relates to pharmaceutical compositions comprising the compounds of formula (I), methods of using these compounds in the treatment of various diseases and disorders, and processes for preparing these compounds.
ARYLPYRAZOLE ETHERS AS INHIBITORS OF LEUKOTRIENE A4 HYDROLASE
申请人:Heim-Riether Alexander
公开号:US20140221373A1
公开(公告)日:2014-08-07
The present invention relates to compounds of formula I or a pharmaceutically acceptable salt thereof, wherein A
1
, A
2
, A
3
, L
1
, L
2
and D are as defined herein. The compounds of formula (I) are useful as inhibitors of leukotriene A
4
hydrolase (LTA4H) and treating LTA4H related disorder. The present invention also relates to pharmaceutical compositions comprising the Compounds of formula (I), methods of using these compounds in the treatment of various diseases and disorders, and processes for preparing these compounds.