Results 71 to 80 of about 14,631 (192)

2-Amino-5-oxo-4-(thiophen-2-yl)-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile

IUCrData
The crystal structure of the title compound, C14H12N2O2S, reveals two symmetrically independent molecules within the asymmetric unit. Each molecule contains a chromenone core attached to a 2-thiophene ring, cyano, and amino groups.
Carren Nyapola, Sizwe J. Zamisa, Eric M. Njogu, Bernard Omondi   +3 more
doaj   +1 more source

5-Amino-7-(3-chlorophenyl)-3,7-dihydro-2H-thieno[3,2-b]pyran-6-carbonitrile 1,1-dioxide

Acta Crystallographica Section E, 2010
The title compound, C14H11ClN2O3S, with fused thiophene and pyran rings, was synthesized via the condensation of dihydrothiophen-3(2H)-one 1,1-dioxide and 2-(3-chlorobenzylidene)malononitrile catalysed by triethylamine in ethanol.
Shi-De Shen, Xiao-Dong Feng, Wei-Hua Yang, Cui-Hua Wang, Chang-Sheng Yao   +4 more
doaj   +1 more source

Elastic and electronically inelastic scattering of electrons by 2H-pyran and 4H-pyran molecules

Journal of Applied Physics
We report on elastic and electronically inelastic integral and differential cross sections for electron collisions with the 2H-pyran and 4H-pyran molecules. The scattering calculations were performed with the Schwinger multichannel method and aimed to (i) investigate the formation of resonant states, (ii) assign and compare the resonance spectrum of ...
Murilo O. Silva, Giseli M. Moreira, Márcio H. F. Bettega, Romarly F. da Costa   +3 more
openaire   +1 more source

9-(4-Formylphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

IUCrData, 2018
In the title compound, C24H26O4, the central 4H-pyran ring adopts a flattened boat conformation, with the mean and maximum deviations of the ring being 0.0582 (6) and 0.1012 (3) Å, respectively.
R. Kalaivanan, V. Sughanya, N. Sureshbabu   +2 more
doaj   +1 more source

Synthesis of Benzothiophene-Fused Pyran Derivatives via Piperidine Promoted Domino Reaction

Heteroatom Chemistry, 2019
A new domino reaction between thioaurones and malononitrile has been reported. This reaction allows efficient access to benzothiophene-fused pyran derivatives in good yields under mild reaction conditions.
Shihang Li, Aimin Yu, Jianfa Li, Xiangtai Meng   +3 more
doaj   +1 more source

Novel functionalized monomers based on kojic acid: snythesis, characterization, polymerization and evalution of antimicrobial activity

Designed Monomers and Polymers, 2017
Two novel acrylate monomers, [5-(benzyloxy)-4-oxo-4H-pyran-2-yl]methyl acrylate and {1-[(5-(benzyloxy)-4-oxo-4H-pyran-2-yl)methyl]-1,2,3-triazol-4-yl}methyl acrylate were synthesized by the reaction of 5-benzyloxy-2-(hydroxymethyl)-4H-pyran-4-one and 5 ...
Mahnaz Saraei, Gholamreza Zarrini, Moshgan Esmati, Leila Ahmadzadeh   +3 more
doaj   +1 more source

6-Unsubstituierte 2H-Pyran-2-one Synthese und Reaktivität

CHIMIA, 1992
Although the 2H-pyran-2-ones have been known for more than 100 years, their importance as versatile intermediates was not widely recognized before the sixties of this century.
Vratislav Kvita, Walter Fischer
doaj   +2 more sources

Para toluenesulfonic acid-catalyzed one-pot, three-component synthesis of benzo[5,6]chromeno[3,2-c]quinoline compounds in aqueous medium

Heterocyclic Communications, 2021
Orang Naser Sadeghpour, Soltani Hadi, Ghiamirad Mehdi, Sabegh Mehdi Ahmadi   +3 more
doaj   +1 more source

Pyran Polymer [PDF]

, 2020
openaire   +1 more source

Studies in Pyrane Chemistry [PDF]

Journal of the American Chemical Society, 1946
G. Forrest Woods, Herman Sanders
openaire   +1 more source