Results 11 to 20 of about 264,075 (214)

Synthesis of 1,4-Disubstituted Mono and Bis-triazolocarbo-acyclonucleoside Analogues of 9-(4-Hydroxybutyl)guanine by Cu(I)-Catalyzed Click Azide-Alkyne Cycloaddition [PDF]

open access: yes, 2011
A series of novel mono-1,2,3-triazole and bis-1,2,3-triazole acyclonucleoside analogues of 9-(4-hydroxybutyl)guanine was prepared via copper(I)-catalyzed 1,3-dipolar cycloaddition of N-9 propargylpurine, N-1-propargylpyrimidines/as-triazine with the ...
Krim, Jamal   +5 more
core   +1 more source

MODIFICATION OF NOVEL ISOXAZOLINES OF FULVENE DERIVATIVES WITH 1,3-DIPOLAR CYCLOADDITION REACTION

open access: yesJournal of the Turkish Chemical Society, Section A: Chemistry, 2018
In this work, 1,3-Dipolar cycloaddition reactions were studied to synthesize fulvene derivatives containing isoxazoline groups in good yields. 1,3-Dipolar cycloaddition reactions are among the most useful strategies for the preparation of organic ...
Omer Gunkara
doaj   +1 more source

SYNTHESIS OF SOME 2,7-DIAZABICYCLO {4.l.0} HEPT-3-ENE DERIVATIVES WITH ANALGESIC AND ANTICOCCIDIAL ACTIVITY [PDF]

open access: yesBulletin of Pharmaceutical Sciences. Assiut University, 1986
The 1,3-dipolar cycloaddition reaction of arylsulphonyl azides to 1,3-disubstituted-1,4-dihydropyridines afforded 2,7-diazabieyclo {4.1.0} hept-3-ene derivatives (III).These compounds exhibited more significant analgesic and anticoccidial activities than
A. El-Badr   +5 more
doaj   +1 more source

Kinetic solvent effects on 1,3-dipolar cycloadditions of benzonitrile oxide [PDF]

open access: yes, 2005
The kinetics of 1,3-dipolar cycloadditions of benzonitrile oxide with a series of N-substituted maleimides and with cyclopentene are reported for water, a wide range of organic solvents and binary solvent mixtures.
Jan B. F. N. Engberts   +5 more
core   +2 more sources

Theoretical analysis of the mechanism and regioselectivity of the 1, 3-dipolar cycloaddition of E-3-(dimethylamino)-1-(10H-phenothiazin-2-yl)prop-2-en-1-one with some nitrilimines using DFT and the distortion/interaction model

open access: yesActa Chimica Slovenica, 2015
The regiochemistry of 1,3-dipolar cycloaddition reactions of E-3-(dimethylamino)-1-(10H-phenothiazin-2-yl) prop-2-en-1-one with some nitrilimines were investigated using density functional theory (DFT) -based reactivity indexes, activation energy ...
Farid Moeinpour, Amir Khojastehnezhad
doaj   +1 more source

1,2,4-Oxadiazoles from cycloreversions of oxadiazabicyclo[3.2.0]heptenes: 1-azetines as thiocyanate equivalents [PDF]

open access: yes, 2013
1,3-Dipolar cycloaddition of nitrile oxides to 4-aryl-2-alkylthio-1-azetines gave a series of oxadiazabicyclo[3.2.0]heptenes as single diastereoisomers. Heating these cycloadducts in toluene resulted in an overall [2+2]-cycloreversion to give 5-alkylthio-
Khan, Musharraf   +5 more
core   +1 more source

Nitrile Oxide, Alkenes, Dipolar Cycloaddition, Isomerization and Metathesis Involved in the Syntheses of 2-Isoxazolines

open access: yesMolecules, 2023
The involvement of 1,3-dipolar cycloaddition (1,3-DP), double bond migration, metathesis, and nitrile oxide (including in situ-generated nitrile oxide) as dipoles, together with the C=C bond containing dipolarophiles, in the syntheses of 2-isoxazolines ...
Stanisław Krompiec   +7 more
doaj   +1 more source

1,3-Dipolar Cycloadditions to Bicyclic Olefins. I. 1,3-Dipolar Cycloadditions to Norbornadienes [PDF]

open access: yesBulletin of the Chemical Society of Japan, 1977
Abstract The 1,3-dipolar cycloadditions of phenylglyoxylonitrile oxide, benzonitrile-N-phenylimine, or N-phenyl-C-p-nitrophenylnitrone to norbornadiene, 2,3-dicyanonorbornadiene, and 2,3-bis(methoxycarbonyl)norbornadiene give the endo-adducts, together with the exo-adducts.
Hisaji Taniguchi   +3 more
openaire   +1 more source

Multicomponent synthesis of spiropyrrolidine analogues derived from vinylindole/indazole by a 1,3-dipolar cycloaddition reaction

open access: yesBeilstein Journal of Organic Chemistry, 2016
A new series of spiropyrrolidine compounds containing indole/indazole moieties as side chains have been accomplished via a one-pot multicomponent synthesis.
Manjunatha Narayanarao   +4 more
doaj   +1 more source

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