Results 21 to 30 of about 12,782 (291)

The Participation of 3,3,3-Trichloro-1-nitroprop-1-ene in the [3 + 2] Cycloaddition Reaction with Selected Nitrile N-Oxides in the Light of the Experimental and MEDT Quantum Chemical Study

Molecules, 2021
The regioselective zw-type [3 + 2] cycloaddition (32CA) reactions of a series of aryl-substituted nitrile N-oxides (NOs) with trichloronitropropene (TNP) have been both experimentally and theoretically studied within the Molecular Electron Density Theory
Karolina Zawadzińska, Mar Ríos-Gutiérrez, Karolina Kula, Przemysław Woliński, Barbara Mirosław, Tomasz Krawczyk, Radomir Jasiński   +6 more
doaj   +1 more source

Asymmetric 1,3-dipolar cycloadditions of acrylamides [PDF]

, 2009
This critical review, which is relevant to researchers in synthetic organic chemistry, focuses on asymmetric 1,3-dipolar cycloadditions with acrylamides.
Kissane, Marie, Maguire, Anita R.
core   +1 more source

An anomalous hydration/dehydration sequence for the mild generation of a nitrile oxide [PDF]

, 2011
A nitrile oxide containing a carbamoyl group is readily generated upon the treatment of 2-methyl-4-nitro-3-isoxazolin-5(2H)-one with water under mild reaction conditions, even in the absence of special reagents.
884, 885, 886, 887, 888, 889, 890, 891, 892, 893, Ariga, Masahiro, Hirao, Shotaro, Kiyoto, Hideyuki, Kobiro, Kazuya, Maki, Asaka, Nishiwaki, Nagatoshi, Okajima, Yoshikazu, Saigo, Kazuhiko, Sawayama, Jun, Uehara, Toshiharu   +19 more
core   +2 more sources

Functionalisation of Artemisinin and Its Ring-contracted Derivatives

Molecules, 2007
Isoxazoline analogues of artemisinin were obtained in low yield and low diastereoselectivity from the 1,3-dipolar cycloaddition of nitrile oxides. Alternatively, starting from the aldehyde 7, a number of transformations - Wittig reaction and reduction ...
Wim Dehaen, Sarah Van Mierloo, Tine Van Neck   +2 more
doaj   +1 more source

[3 + 2] Cycloaddition reactions of nitrile oxides generated in situ from aldoximes with alkenes and alkynes under ball-milling conditions

Green Chemistry Letters and Reviews, 2022
A convenient and efficient [3 + 2] cycloaddition reaction of alkenes and alkynes with the in situ generated nitrile oxides from aldoximes in the presence of NaCl, Oxone and Na2CO3 has been developed to afford a series of isoxazoles and isoxazolines at ...
Run-Kai Fang, Zheng-Chun Yin, Jun-Shen Chen, Guan-Wu Wang   +3 more
doaj   +1 more source

Facile and green synthesis of 3,5-disubstituted isoxazoles using doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as an efficient nano-catalyst under ultrasonic irradiation [PDF]

شیمی کاربردی روز, 2019
In the present research, doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as a heterogeneous and efficient nano-catalyst has been employed for green and mild synthesis of 3,5-disubstituted isoxazoles under ultrasonic irradiation. In
Somayeh Behrouz
doaj   +1 more source

Unveiling the Different Chemical Reactivity of Diphenyl Nitrilimine and Phenyl Nitrile Oxide in [3+2] Cycloaddition Reactions with (R)-Carvone through the Molecular Electron Density Theory

Molecules, 2020
The [3+2] cycloaddition (32CA) reactions of diphenyl nitrilimine and phenyl nitrile oxide with (R)-carvone have been studied within the Molecular Electron Density Theory (MEDT). Electron localisation function (ELF) analysis of these three-atom-components
Mar Ríos-Gutiérrez, Luis R. Domingo, M’hamed Esseffar, Ali Oubella, My Youssef Ait Itto   +4 more
doaj   +1 more source

1,3-Dipolar cycloadditions of 2-thio-3-chloroacrylamides with nitrile oxides and nitrones [PDF]

, 2010
1,3-Dipolar cycloadditions of 2-thio-3-chloroacrylamides with nitrile oxides and nitrones is described. A series of novel isoxazolines are isolated from the nitrile oxide cycloadditions, whilst the isoxazolines generated from the nitrone cycloadditions ...
Kissane, Marie, Lawrence, Simon E., Maguire, Anita R.   +2 more
core   +1 more source

Synthesis of highly functionalized β-aminocyclopentanecarboxylate stereoisomers by reductive ring opening reaction of isoxazolines

Beilstein Journal of Organic Chemistry, 2012
A rapid and simple procedure was devised for the synthesis of multifunctionalized cyclic β-amino esters and γ-amino alcohols via the 1,3-dipolar cycloaddition of nitrile oxides to β-aminocyclopentenecarboxylates.
Melinda Nonn, Loránd Kiss, Reijo Sillanpää, Ferenc Fülöp   +3 more
doaj   +1 more source

One-step synthesis of differently bis-functionalized isoxazoles by cycloaddition of carbamoylnitrile oxide with β-keto esters [PDF]

, 2012
A new protocol for synthesizing different functionalized isoxazoles is provided. Carbamoylnitrile oxide generated from nitroisoxazolone underwent inverse electron-demand 1,3-dipolar cycloaddition with 1,3-dicarbonyl compounds in the presence of magnesium
975, 976, 977, 978, 979, 980, 981, 982, Ariga, Masahiro, Hirao, Shotaro, Ise, Yumiko, Kobiro, Kazuya, Nishiwaki, Nagatoshi, Nishizawa, Maho, Saigo, Kazuhiko, Sawayama, Jun   +15 more
core   +1 more source