Regioselective synthesis of isoxazole and 1,2,4-oxadiazole-derived phosphonates <i>via</i> [3 + 2] cycloaddition
作者:Bohdan A. Chalyk、Alona S. Sosedko、Dmitriy M. Volochnyuk、Andrey A. Tolmachev、Konstantin S. Gavrilenko、Oleksandr S. Liashuk、Oleksandr O. Grygorenko
DOI:10.1039/c8ob02257g
日期:——
results of the study on reactions of halogenoximes bearing (protected) functional groups or fluorinated substituents with various phosphorus-containing dipolarophiles are described. To control the regioselectivity of the reaction, vinylphosphonates bearing a leaving group (i.e. bromine or dialkylamino group) in the α or β position were used; 3,5- and 3,4-disubstituted isoxazoles were obtained in 47–80%
Synthesis of 5-(Fluoroalkyl)isoxazole Building Blocks by Regioselective Reactions of Functionalized Halogenoximes
作者:Bohdan A. Chalyk、Kateryna V. Hrebeniuk、Yulia V. Fil、Konstantin S. Gavrilenko、Alexander B. Rozhenko、Bohdan V. Vashchenko、Oleksandr V. Borysov、Angelina V. Biitseva、Pavlo S. Lebed、Iulia Bakanovych、Yurii S. Moroz、Oleksandr O. Grygorenko
DOI:10.1021/acs.joc.9b02264
日期:2019.12.20
halogenoximes and propargylic alcohol. An alternative approach based on nucleophilic substitution in 5-bromomethyl derivatives was found to be more convenient for the preparation of 5-fluoromethylisoxazoles. Reaction of isoxazole-5-carbaldehydes with the Ruppert-Prakash reagent was used for the preparation of (β,β,β-trifluoro-α-hydroxyethyl)isoxazoles. Utility of described approaches was shown by multigram preparation
AZOLE HETEROCYCLIC COMPOUND, PREPARATION METHOD, PHARMACEUTICAL COMPOSITION AND USE
申请人:Shanghai Institute of Materia Medica,
Chinese Academy of Sciences
公开号:EP2725024A1
公开(公告)日:2014-04-30
The present invention relates to the filed of pharmarcutical chemistry, and in particular, to a novel class of azole compounds represented by general formula (I), (II) or (III) amd a preparation method thereof, a pharmarcutical composition with the compounds as active components, and a use of the azole compounds and the pharmarcutical composition in the preparation of a medicament for treatment of diseases associated with Lp-PLA2 enzyme activities, wherein each substituent is as deinfed in the specifictaion.
Exploring Heteroaromatic Rings as a Replacement for the Labile Amide of Antiplasmodial Pantothenamides
作者:Jinming Guan、Christina Spry、Erick T. Tjhin、Penghui Yang、Tanakorn Kittikool、Vanessa M. Howieson、Harriet Ling、Lora Starrs、Dustin Duncan、Gaetan Burgio、Kevin J. Saliba、Karine Auclair
DOI:10.1021/acs.jmedchem.0c01755
日期:2021.4.22
pantothenamides show potent antiplasmodial activity, hydrolysis by pantetheinases/vanins present in blood rapidly inactivates them. We herein report the facile synthesis and biologicalactivity of a smalllibrary of pantothenamide analogues in which the labile amide group is replaced with a heteroaromatic ring. Several of these analogues display nanomolar antiplasmodial activity against Plasmodium falciparum and/or
Copper(0) Nanoparticles in Click Chemistry: Synthesis of 3,5-Disubstituted Isoxazoles
作者:T. M. Vishwanatha、Vommina V. Sureshbabu
DOI:10.1002/jhet.2065
日期:2015.11
An efficient procedure for the synthesis of 3,5‐disubstituted isoxazoles via [3 + 2] cycloaddition reaction of in situ generated nitrileoxides with acetylenes employing readily preparable copper(0) nanoparticles is described. A variety of in situ generated nitrileoxide and acetylenic substrates were engaged in the study and found to undergo cyclization in short duration affording respective isoxazoles