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
Synthesis of Bi- and Polyfunctional Isoxazoles from Amino Acid Derived Halogenoximes and Active Methylene Nitriles
作者:Bohdan A. Chalyk、Kateryna V. Hrebeniuk、Konstantin S. Gavrilenko、Oleh V. Shablykin、Oksana O. Yanshyna、Daniil Bash、Pavel K. Mykhailiuk、Oleksandr S. Liashuk、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.201800311
日期:2018.6.15
either an electron‐withdrawing (i.e., CO2Me, CN, or SO2Me) or a heteroaryl group at the α‐position leads to 5‐aminoisoxazoles underbasicconditions. The transformation of a malononitrile dimer under analogous conditions has been shown to provide polyfunctional isoxazolo[5,4‐b]pyridine derivatives.
含有受保护氨基的氯肟与在α位具有吸电子(即CO 2 Me,CN或SO 2 Me)或杂芳基的腈之间的反应在碱性条件下会生成5-氨基异恶唑。已显示丙二腈二聚体在类似条件下的转化可提供多官能异恶唑并[5,4- b ]吡啶衍生物。
THIOPHENE 1,2,4-TRIAZOLE DERIVATIVES AS MODULATORS OF MGLUR5
申请人:GRANBERG Kenneth
公开号:US20090111825A1
公开(公告)日:2009-04-30
The present invention is directed to novel compounds, to a process for their preparation, their use in therapy and pharmaceutical compositions comprising the novel compounds.
本发明涉及新化合物,其制备方法,它们在治疗中的应用以及包含这些新化合物的药物组合物。
Synthesis of 4-Hetarylisoxazoles from Amino Acid-Derived Halogenoximes and Push-Pull Enamines
作者:Bohdan A. Chalyk、Kateryna V. Hrebeniuk、Konstantin S. Gavrilenko、Irene B. Kulik、Alexander B. Rozhenko、Dmitriy M. Volochnyuk、Oleksandr S. Liashuk、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.201800753
日期:2018.11.1
Reaction of chloroximes with protected amino group and enamines bearing electron‐withdrawing groups at the β position (i.e. push‐pull enamines) under basic conditions led to 3,4‐disubstituted isoxazole derivatives bearing hetaryl, nitro, or difluoroacetyl group at the 4th position.