Results 31 to 40 of about 17,890 (211)

Halogenation effects in Intramolecular Furan Diels-Alder reactions:broad scope synthetic and computational studies [PDF]

open access: yes, 2013
For the first time a comprehensive synthetic and computational study of the effect of halogen substitution on both furan and dienophile for the intramolecular Furan Diels-Alder (IMDAF) reaction has been undertaken.
Bebbington, Magnus William Paul   +3 more
core   +1 more source

The 1,3-dipolar cycloaddition of 1-methylphthalazinium ylides to non-symmetrically activated alkynes on a solid support under microwave irradiation [PDF]

open access: yesJournal of the Serbian Chemical Society, 2006
In this paper, a comparative study of the reaction of 1-methylpihthalazinium ylides with nonsymmetrically activated alkynes in a solid media by classical heating and under microwaves is presented.
IONEL MANGALAGIU   +2 more
doaj   +3 more sources

Synthesis of Thieno[2,3-d]-1,3-dithiol-2-thiones from Thieno[2,3-d]-1,2,3-thiadiazoles: Matryoshka-type autoclave for high-temperature, high-pressure thermolysis microscale reactions

open access: yesMolecules, 2002
Thieno[2,3-d]-1,2,3-thiadiazoles (1) react with carbon disulfide in a "Matryoshkatype" double compartment autoclave [1] to yield thieno[2,3-d]-1,3-dithiol-2-thiones (2).
Ving J. Lee   +3 more
doaj   +1 more source

Synthesis of enantiomeric polyhydroxyalkylpyrrolidines from 1,3-dipolar cycloadducts. Evaluation as inhibitors of a β-galactofuranosidase [PDF]

open access: yes, 2016
Enantiomeric 2,3,4-tris(hydroxyalkyl)-5-phenylpyrrolidines have been synthesized from the major cycloadducts obtained by the 1,3-dipolar cycloaddition of sugar enones with azomethine ylides derived from natural amino acids.
Oliveira Udry, Guillermo Alejandro   +3 more
core   +2 more sources

Photo-induced 1, 3-Dipolar Cycloaddition Reaction of Aziridinedicarboximide

open access: yesChemical and Pharmaceutical Bulletin, 1969
Cycloaddition reaction of N-(p-methoxyphenyl)-1-benzyl-2, 3-aziridinedicarboximide (8) with dimethyl acetylenedicarboxylate (3) was not effected thermally, but under irradiation it resulted in a formation of 1 : 1-cycloadducts, I (9), II (17), and III (34), and a 1 : 2-cycloadduct IV (38).
SADAO OIDA, EIJI OHKI
openaire   +2 more sources

Alkylation and 1,3-Dipolar Cycloaddition of 6-Styryl-4,5-dihydro-2H-pyridazin-3-one: Synthesis of Novel N-Substituted Pyridazinones and Triazolo[4,3-b]pyridazinones

open access: yesJournal of Chemistry, 2013
Some new N-substituted pyridazinones and triazolo[4,3-b]pyridazinones were synthesized, respectively, by simple alkylation and 1,3-dipolar cycloaddition of pyridazin-3-one with nitrile imines.
Souad Mojahidi   +6 more
doaj   +1 more source

Three-Component Synthesis of Polysubstituted Homoproline Analogs

open access: yesMolecules, 2005
Tetrasubstituted pyrrolidines representing analogs of homoproline weresynthesized by three-component condensation of aryl(heteroaryl)aldehydes, asparagineand N-methylmaleimide (NMM). Compounds with (1S*, 3R*, 3aS*, 6aR*)-configurationat the corresponding
V. Irkha, K. Kudryavtsev
doaj   +1 more source

Influence of activated carbons on the kinetics and mechanisms of aromatic molecules ozonation [PDF]

open access: yes, 2010
Companies have been looking for new methods for treating toxic or refractory wastewaters; which can mainly be used prior to or after or in connexion with biological treatment processes.This paper compares conventional ozone oxidation with activatedcarbon
Debellefontaine, Hubert   +4 more
core   +2 more sources

(2S)-[3-(Anthracen-9-yl)-4,5-dihydroisoxazol-5-yl]methyl 2-[(tert-butoxycarbonyl)amino]propanoate

open access: yesMolbank, 2014
The synthesis of the (2S)-[3-(anthracen-9-yl)-4,5-dihydroisoxazol-5-yl]methyl 2-[(tert-butoxycarbonyl)amino]propanoate is obtained through the 1,3-dipolar cycloaddition of the stable anthracenenitrile oxide and the N-Boc protected (S)-alanine allyl ester
Misal Giuseppe Memeo   +2 more
doaj   +1 more source

Recent advances in the catalytic asymmetric 1,3-dipolar cycloaddition of azomethine ylides [PDF]

open access: yes, 2014
Catalytic asymmetric 1,3-dipolar cycloadditions of azomethine ylides have turned out to be one of the most efficient methods for the preparation of enantioenriched pyrrolidines.
Adrio, Javier, Carretero, Juan C.
core   +2 more sources

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