Difluoromethyl Nitrile Oxide (CF<sub>2</sub>HCNO): A Neglected Chemical Reagent
作者:Andrii Khutorianskyi、Bohdan Chalyk、Petro Borysko、Anna Kondratiuk、Pavel K. Mykhailiuk
DOI:10.1002/ejoc.201700764
日期:2017.7.25
A novel chemical reagent – difluoromethyl nitrile oxide, CF2HCNO – was generated in situ for the first time. The synthesis commenced with ethyl difluoroacetate and included only two chemical steps. The difluoromethyl nitrile oxide smoothly participated in [3+2]-cycloaddition reactions with alkynes and enamines to give CF2H-isoxazoles; these products are promising cores for agrochemistry. A representative
Bredereck,H. et al., Chemische Berichte, 1968, vol. 101, # 12, p. 4048 - 4056
作者:Bredereck,H. et al.
DOI:——
日期:——
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.