Results 21 to 30 of about 39,482 (297)

Synthesis and Anti-Tuberculosis Activity of Substituted 3,4-(dicoumarin-3-yl)-2,5-diphenyl Furans and Pyrroles

open access: yesEngineering Proceedings, 2022
Increasing rates of multi-drug resistant (MDR) and extremely-drug resistant (XDR) cases of tuberculosis (TB) strains are alarming, and eventually hampered an effective control of the pathogenic disease. In the present study, nine derivatives of 2,3-bis(2-
Bhagwat Jadhav   +2 more
doaj   +1 more source

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

Recent Trends in the Production, Combustion and Modeling of Furan-Based Fuels

open access: yesEnergies, 2018
There is growing interest in the use of furans, a class of alternative fuels derived from biomass, as transportation fuels. This paper reviews recent progress in the characterization of its combustion properties.
Mazen A. Eldeeb, Benjamin Akih-Kumgeh
doaj   +1 more source

(Furan-2-yl)[(furan-2-yl)carbonyldisulfanyl]methanone [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2011
The mol-ecule of the title compound, C(10)H(6)O(4)S(2), has crystallographically imposed twofold symmetry. The dihedral angle formed by the furan rings is 80.90 (8)°. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds into chains running parallel to the a axis [C-S-S-C torsion angle = 82.04 (11)°].
Qian Wang, Youqin Shu, Xuehui Hou
openaire   +3 more sources

Highly-functionalised difluorinated cyclohexane polyols via the Diels–Alder reaction : regiochemical control via the phenylsulfonyl group [PDF]

open access: yes, 2005
A difluorinated dienophile underwent cycloaddition reactions with a range of furans to afford cycloadducts whichcould be processed regio- and stereoselectively via episulfonium ions, generated by the reaction between their alkenyl groups and ...
Crowley, Patrick J   +5 more
core   +1 more source

Furan-Containing Oligoaryl Cyclophanene [PDF]

open access: yesOrganic Letters, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Tseng, Jui-Chang   +8 more
openaire   +3 more sources

A surprising steric effect on a tandem cycloaddition/ring-opening reaction : rapid syntheses of difluorinated analogues of (hydroxymethyl)conduritols [PDF]

open access: yes, 2004
Difluorinated analogues of (hydroxymethyl)conduritols can be synthesised from selected furans and a difluorinated dienophile in two reaction ...
Fawcett, J.   +5 more
core   +1 more source

Synthesis of 3-Aryl-3-(Furan-2-yl)Propanoic Acid Derivatives, and Study of Their Antimicrobial Activity

open access: yesMolecules, 2022
Reactions of 3-(furan-2-yl)propenoic acids and their esters with arenes in Brønsted superacid TfOH affords products of hydroarylation of the carbon–carbon double bond, 3-aryl-3-(furan-2-yl)propenoic acid derivatives. According to NMR and DFT studies, the
Mikhail V. Kalyaev   +10 more
doaj   +1 more source

SYNTHESYS OF A FUNCTIONALIZED TETRAHYDROFURAN FRAGMENT THROUGH BROMINATION-CYCLIZATION OF A CONJUGATED DIENE [PDF]

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2010
Conjugate 1,4-addition of N-bromosuccinimide (NBS) to a diene system, possessing a suitable oxygen functionality, leads to functionalized tetrahydrofuran derivatives, which can be further derivatized into different synthetic targets.
Veaceslav Kulciţki   +4 more
doaj  

Silver and platinum-catalysed addition of O–H and N–H bonds to allenes [PDF]

open access: yes, 2014
Transition-metal catalysed nucleophile addition to allenes is a very powerful tool for the synthesis of functionalised molecules containing heteroatoms, heterocycles in the intramolecular version, or allyl derivatives in the intermolecular version.
Munoz-Herranz, Maria
core   +1 more source

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