Results 71 to 80 of about 99,145 (214)
Ultrasound-promoted synthesis of novel fused heterocycles by criss-cross cycloaddition
Journal of Saudi Chemical Society, 2016 This work reports a novel and highly efficient methodology for the synthesis of perhydrotriazolotriazoledithions from two successive 1,3-dipolar cycloaddition under ultrasound irradiation.
Javad Safari +2 more
doaj +1 more source
An overview of the cycloaddition chemistry of fulvenes and emerging applications
Beilstein Journal of Organic Chemistry, 2019 The unusual electronic properties and unique reactivity of fulvenes have interested researchers for over a century. The propensity to form dipolar structures at relatively low temperatures and to participate as various components in cycloaddition ...
Ellen Swan +2 more
doaj +1 more source
5-Benzoyl-N,4-diphenyl-4,5-dihydro-1H-pyrazole-3-carboxamide
Acta Crystallographica Section E, 2009 The title compound, C23H19N3O2, was synthesized by the 1,3-dipolar cycloaddition reaction of N-phenyl-α-diazoacetamide and chalcone. In the molecule, the pyrazoline ring assumes an envelope conformation.
Long He
doaj +1 more source
1,3-Dipolar Cycloadditions of N-Benzyl Furfuryl Nitrones with Electron-rich Alkenes
Molecules, 2000 The 1,3-dipolar cycloaddition reaction of N-benzyl-C-(2-furyl)nitrones with electron-rich alkenes gives preferentially trans-substituted 3,5-disubstituted isoxazolidines (endo approach).
Tomas Tejero +3 more
doaj +1 more source
INTRAMOLECULAR 1,3-DIPOLAR CYCLOADDITION OF ALKYLAZIDE-ENONES AND REARRANGEMENTS OF THE TRIAZOLINE INTERMEDIATES [PDF]
, 2011 [[abstract]]The intramolecular 1,3-dipolar cycloaddition of alkylazide-enones is followed by several novel rearrangements.[[fileno]]2010328010017[[department ...
SHA, CK;OUYANG, SL;HSIEH, DY;HSEU, TH
core +1 more source
Natural Product Communications, 2018 An one-step and efficient access to the new dammarane A-quinolones by ozonolysis of 2,3-indolodipterocarpol at 0°C through the 1,3-dipolar cycloaddition of ozone to the C2-C3 double bond of the triterpenoid core is reported.
Irina E. Smirnova +3 more
doaj +1 more source
One-pot Microwave-Assisted Synthesis of 1H-Phenanthro[9,10- d][1,2,3]triazole
Molbank, 2008 In this study, a fast and good yield one-pot microwave-assisted synthesis (45 seconds) of 1H-phenanthro[9,10-d][1,2,3]triazole by a 1,3-dipolar cycloaddition reaction of sodium azide and 9-bromophenanthrene in the presence of potassium tert-butoxide in ...
Mehrak Faraji, Avat Arman Taherpour
doaj +1 more source
1 : 3 Dipolar Cycloaddition of Benzonitrile Oxide on to Cinnamyl Arylamines
, 1971 1:3 Dipolar Cycloaddition of Benzonitrile Oxide on to Cinnamyl ...
Suresh Mohan, J. S. Sandhu, Baldev Kumar
core +1 more source
Orbital: The Electronic Journal of Chemistry, 2010 Naphthoquinones are known according to their important bio-activities, such as their antitumoral and topoisomerase inhibition properties. From 2-azido (3) or 2,3-diacetylene-1,4-naphthoquinone (4) it was possible to obtain triazole derivatives ...
Wilson Silva do Nascimento +3 more
doaj
Synthesis of Spiroisoxazolines by 1,3-Dipolar Cycloaddition
Molecules, 1997 The cycloaddition of the chiral nitrile oxide 1 to 1-R-substituted 3,3-methylene-5,5-dimethyl-2-pyrrolidinones 2 (where R is H, n-butyl-, 1,1-dimethylethoxycarbonyl-, 1-methylethenyl- and acetyl-) proceeds regioselectively under the formation of ...
Peter Ertl +3 more
doaj +1 more source