Results 111 to 120 of about 169 (141)

Synthesis and antifungal activities of novel polyheterocyclic spirooxindole derivatives

Organic & Biomolecular Chemistry, 2015
A series of spirooxindole tetrahydrofuran derivatives were obtained in moderate to good yields via base-mediated cascade [3+2] double Michael reactions under mild conditions. Their antifungal effects on selected five target phytopathogenic fungi were investigated, and their structure antifungal activity relationships were also discussed.
Jia-Shou, Wu, Xue, Zhang, Ying-Lao, Zhang, Jian-Wu, Xie   +3 more
openaire   +2 more sources

Synthesis of New Polyheterocyclic Compounds Based on Chalcones

Russian Journal of Organic Chemistry, 2019
The reaction of methyl N-{4-[2-(2-oxo-2,3-dihydro-1H-indol-3-ylidene)acetyl]phenyl}carbamate with tosylmethyl isocyanide in tetrahydrofuran in the presence of potassium tert-butoxide led to the formation of methyl N-{4-[(4-oxo-4,5-dihydro-3H-pyrrolo[2,3-c]quinolin-1-yl)carbonyl]phenyl}carbamate. Three-component condensation of methyl N-{4-[(E)-3-R-prop-
A. V. Velikorodov, N. N. Stepkina, M. A. Polovinkina, V. P. Osipova   +3 more
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Reductive polyheterocyclization: A new approach to the synthesis of polyheteroarylenes

Polymer, 1984
Abstract A new general approach to the synthesis of polyheteroarylenes by reductive polyheterocyclization, based on the reduction and cyclization of o -nitrosubstituted heterochain polymers has been reviewed. The synthetic possibilities of the method are demonstrated with a wide range of reactions.
V.V Korshak, A.L Rusanov, D.S Tugushi
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Green Multicomponent‐Click Strategy for One‐Pot Synthesis of Polyheterocyclic Estazolam Aza‐Analogs and Their Symmetrical Polyheterocycles

Asian Journal of Organic Chemistry
ABSTRACT A novel one‐pot synthesis of polyheterocyclic compounds (PHCs) incorporating fused 1,5‐disubstituted 1,2,3‐triazole‐1,4‐benzodiazepines (fused 1,5‐Ds‐1,2,3‐T‐1,4‐BZD) bound to 1,5‐disubstituted tetrazoles (1,5‐Ds‐Ts) was developed via Ugi‐azide four‐component reaction (UA‐4CR), followed by an intramolecular alkyne–azide ...
Manuel A. Rentería‐Gómez, Diana García‐García, Alejandro Corona‐Díaz, Rocío Gámez‐Montaño   +3 more
openaire   +1 more source

New monomers for the synthesis of heat-stable polyheterocycles

Chemistry of Heterocyclic Compounds, 1970
To obtain benzodioxazole analogs of the polypyromellitimides and polymers with alternating pyromellitimide and benzodioxazole links, we have synthesized 2,6-di(paminophyl)benzo[1,2-d∶5,4-d′]dioxazole (I), 2,6-di[p-(p′-aminophenoxy)phenyl]benzo-[1,2-d∶5,4-d′]dioxazole (II), N,N′-di(p-chloroformylphenyl)pyromellitdiimide (III) and N,N′-di(p ...
V. P. Evstaf'ev, G. I. Braz, A. Ya. Yakubovich   +2 more
openaire   +1 more source

Synthesis of bioactive polyheterocyclic ring systems as 5α-reductase inhibitors

European Journal of Medicinal Chemistry, 2010
Simple synthetic strategies for the hitherto unreported [1,2,4]triazolo[4,3-a]pyrido[4,3-d]pyrimidines 8 and [1,2,4]triazolo[4',3':1,2]pyrimido[4,5-b][1,6]naphthyridine-5-one 15 are described based on reaction of thione 3 and 12 with hydrazonoyl chloride 1a-h, respectively.
Naglaa A, Abdel Hafez, Thoraya A, Farghaly, Mohamed A, Al-Omar, Mohamed M, Abdalla   +3 more
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Regioselective Synthesis of Coumarin‐Annulated Polyheterocycles by [3,3] Sigmatropic Rearrangement

Synthetic Communications, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
K. C. Majumdar, B. Chattopadhyay
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Substrate-controlled switchable asymmetric annulations to access polyheterocyclic skeletons

Chemical Communications, 2016
Substrate-controlled switchable asymmetric annulations of Morita–Baylis–Hillman carbonates from isatins and α-cyano-α,β-unsaturated ketones catalysed by cinchona-derived tertiary amines, giving tetrahydrofuro[2′,3′:4,5]pyrano[2,3-b]indoles or spirooxindoles incorporating a cyclopentene motif, were disclosed.
Kai-Kai, Wang, Pan, Wang, Qin, Ouyang, Wei, Du, Ying-Chun, Chen   +4 more
openaire   +2 more sources

Controlled Redox and Electrical Properties in Polyheterocycles

2000
Abstract : Electrochromic and conducting polymers may prove especially important for a number of Air Force applications including chameleon coatings, informational displays, IR and microwave attenuation, dialed tint windows, and gap sealants. We are developing conjugated, redox active, and conducting polymers with controllable electronic band gaps that
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Stitching Large Aromatic Polyheterocycles

Synfacts, 2023
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