ANTHELMINTIC COMPOUNDS AND COMPOSITIONS AND METHOD OF USING THEREOF
申请人:Meng Charles Q.
公开号:US20140142114A1
公开(公告)日:2014-05-22
The present invention relates to novel anthelmintic compounds of formula (I) below:
wherein
Y and Z are independently a bicyclic carbocyclic or a bicyclic heterocyclic group, or one of Y or Z is a bicyclic carbocyclic or a bicyclic heterocyclic group and the other of Y or Z is alkyl, alkenyl, alkynyl, cycloalkyl, phenyl, heterocyclyl or heteroaryl, and variables X
1
, X
2
, X
3
, X
4
, X
5
, X
6
, X
7
and X
8
are as defined herein. The invention also provides for veterinary compositions comprising the anthelmintic compounds of the invention, and their uses for the treatment and prevention of parasitic infections in animals.
The asymmetric catalytic addition of alcohols (phenols) to non‐activated alkenes has been realized through the cycloisomerization of 2‐allylphenols to 2‐methyl‐2,3‐dihydrobenzofurans (2‐methylcoumarans). The reaction was catalyzed by a chiral titanium–carboxylate complex at uncommonly hightemperatures for asymmetric catalytic reactions. The catalyst was generated by mixing titanium isopropoxide, the
Bis(μ-oxo)–Dititanium(IV)–Chiral Binaphthyldisulfonate Complexes for Highly Enantioselective Intramolecular Hydroalkoxylation of Nonactivated Alkenes
作者:Wen-Bin Xie、Zhi Li
DOI:10.1021/acscatal.1c01146
日期:2021.5.21
A series of chiral 1,1′-binaphthyl-2,2′-disulfonic acids was designed, synthesized, and applied in a highlyenantioselective Ti-catalyzed intramolecular hydroalkoxylation of nonactivated alkenes. The catalyst is probably a complex between two chiral binaphthyldisulfonate ligands and a bis(μ-oxo)–dititanium(IV) core structure. The sulfonamide groups of the ligands and water are necessary for the catalysis
We report an enantio- and diastereoselective, complete hydrogenation of multiply substituted benzofurans in a one-pot cascade catalysis. The developed protocol facilitates the controlled installation of up to six new defined stereocenters and produces architecturally complex octahydrobenzofurans, prevalent in many bioactive molecules. A unique match of a chiral homogeneous ruthenium-N-heterocyclic
Axially Chiral 1,1'‐Binaphthyl‐2‐Carboxylic Acid (BINA‐Cox) as Ligands for Titanium‐Catalyzed Asymmetric Hydroalkoxylation
作者:Sebastian L. Helmbrecht、Johannes Schlüter、Max Blazejak、Lukas Hintermann
DOI:10.1002/ejoc.201901895
日期:2020.4.16
1'‐biaryl‐2‐carboxylic acids, a catalyst for the asymmetric addition of phenolic hydroxyl to non‐activated alkene at hightemperature (240 °C) is formed. This work systematically develops scalable syntheses of variably decorated, enantiopure 1,1'‐biaryl‐2'‐carboxylic acids, which are then tested as steering ligands in intramolecular asymmetric catalytic hydroalkoxylation reactions.