Facile and regioselective synthesis of 4-fluoroalkyl-2-quinolinol
摘要:
4-Fluoroalkyl-2-quinolinols were regioselectively synthesized in moderate to high yields by acid-assisted intramolecular ring-closure reaction of the corresponding N-aryl-3-oxa-polyfluoroalkanamides prepared from 2,2-dihydropolyfluoroalkanoic acids in two steps. (C) 2001 Elsevier Science B.V. All rights reserved.
emergence of direct enolization protocols providing atom-economical and operationally simple methods to use enolates for stereoselective C-C bond-forming reactions, eliminating the inherent drawback of the preformation of enolates using stoichiometric amounts of reagents. In its infancy, direct enolization relied heavily on the intrinsic acidity of the latent enolates, and the reaction scope was limited
Semi-Industrial Fluorination of β-Keto Esters with SF4: Safety vs Efficacy
作者:Serhii A. Trofymchuk、Denys V. Kliukovskyi、Sergey V. Semenov、Andrii R. Khairulin、Valerii O. Shevchenko、Maksym Y. Bugera、Karen V. Tarasenko、Dmitriy M. Volochnyuk、Sergey V. Ryabukhin
DOI:10.1055/s-0037-1610744
日期:2020.4
deoxofluorination of β-keto esters using SF4 was investigated. The scope and limitation of the reaction were determined. The efficient method for the synthesis of β,β-difluorocarboxylic acids was elaborated based on the reaction. The set of mentioned acids, being the perspective building blocks for medicinal chemistry, were synthesized on multigram scale. The safety of SF4 use was discussed. The described
Synthesis of 2-[(Z)-1-hydropolyfluoro-1-alkenyl]-4H-3,1-benzoxazin-4-ones
作者:Jin-Tao Liu、He-Jun Lü
DOI:10.1016/s0022-1139(01)00456-0
日期:2001.10
N,N′-dicyclohexylcarbodiimide induced condensation of 2,2-dihydropolyfluoroalkanoic acid and anthranilic acid or its derivatives followed by a dehydrating ring-closure reaction in the presence of Ac2O gave 2-[(Z)-1-hydropolyfluoro-1-alkenyl]-4H-3,1-benzoxazin-4-ones in good to excellent yields.
An Improved Oxidation of an Alcohol Using Aqueous Permanganate and Phase-Transfer Catalyst
作者:Arshed Mahmood、Graham E. Robinson、Lyn Powell
DOI:10.1021/op990021h
日期:1999.9.1
[EN] CYCLOPROPYL-(HETERO)ARYL-SUBSTITUTED ETHYLSULPHONYLPYRIDINE DERIVATIVES<br/>[FR] DÉRIVÉS D'ÉTHYLSULFONYLPYRIDINE À SUBSTITUTION CYCLOPROPYLE- (HÉTÉRO)ARYLE
申请人:[en]BOEHRINGER INGELHEIM VETMEDICA GMBH
公开号:WO2023036934A1
公开(公告)日:2023-03-16
The present invention relates to cyclopropyl-(hetero)aryl substituted ethylsulphonyl-pyridine derivatives of formula (I),wherein the variables are as defined in the description and in the claims, which can be used as antiparasitic agents for the treatment, prevention and/or control of parasitic infections and/or infestations in animals.