Results 61 to 70 of about 24,157 (222)
Acta Crystallographica Section E Structure Reports Online, 2010 In the title compound, C(14)H(9)BrN(2), the benzene and quinoxaline rings are almost coplanar [r.m.s. deviation = 0.0285 (3) Å and dihedral angle = 2.1 (2)°].
Zhi-jian Wang +4 more
openaire +3 more sources
Photochemistry of Aromatic N‐Oxides in Water Probed by Time‐Resolved X‐ray Absorption Spectroscopy
Chemistry – A European Journal, EarlyView.Time‐resolved XAS at the nitrogen and oxygen K‐edges is applied to the photorearrangement of two N‐oxides in water. Pyridine N‐oxide rapidly forms the oxaziridine isomer. Pyridazine N‐oxide undergoes ring opening to the diazo compound, without any evidence of intermediates.
Maximilian Paradiz Domínguez +3 more
wiley +1 more source
Redox Switchable Thianthrene Cavitands [PDF]
, 2016 A redox activated vase-to-kite conformational change is reported for a new resorcinarene-based cavitand appended with four quinoxaline-fused thianthrene units.
Bertani, Federico +3 more
core +1 more source
Acta Crystallographica Section E Structure Reports Online, 2012 In the title compound, C14H9FN2, the dihedral angle between the benzene ring and the quinoxaline ring system is 22.2 (3)°. Any aromatic π–π stacking in the crystal must be very weak, with a minimum centroid–centroid separation of 3.995 (2) Å.
Cui-Ping Wang +4 more
openaire +3 more sources
Bifunctional Photocatalysts: Exploiting Proximity for Enhanced Reaction Performance
Chemistry – A European Journal, EarlyView.This review covers the application of the bifunctional approach to photocatalysis as a means to attain (enhanced) enantioselectivity, and, more in general, as a strategy to enhance the catalytic performance through an effective use of short‐lived reaction intermediates.
Luigi Dolcini +3 more
wiley +1 more source
Scope and Mechanistic Study of the Ruthenium-Catalyzed \u3cem\u3eortho\u3c/em\u3e-C−H Bond Activation and Cyclization Reactions of Arylamines with Terminal Alkynes [PDF]
, 2005 The cationic ruthenium hydride complex [(PCy3)2(CO)(CH3CN)2RuH]+BF4- was found to be a highly effective catalyst for the C−H bond activation reaction of arylamines and terminal alkynes.
Yi, Chae S., Yun, Young
core +1 more source
The enthalpies of dissociation of the N-O bonds in two quinoxaline derivatives [PDF]
, 2009 The present work reports the first experimental thermochemical study of mono-N-oxides derived from quinoxaline, namely, 3-methoxycarbonyl-2-methyl-quinoxaline N-oxide and 3-ethoxycarbonyl-2-methyl-quinoxaline N-oxide.
Andre R Monteiro +4 more
core +1 more source
Chemistry – A European Journal, EarlyView.A readily accessible, air‐ and moisture‐stable palladium precatalyst, [Pd(1‐MeNAP)(tBuBrettPhos)]OTf, enables the direct N‐arylation of NH‐sulfoximines with (hetero)aryl chlorides under exceptionally mild conditions ideal for late‐stage diversification of drug‐like scaffolds.
Sourav Manna +5 more
wiley +1 more source
Sinteza, in vitro antitumorsko ispitivanje i radiosenzitirajuće vrednovanje novih derivata 4-[3-(supstituiranih)tioureido]-N-(kinoksalin-2-il)benzensulfonamida [PDF]
, 2011 Sulfonamides and quinoxaline derivatives possess many types of biological activities and have been recently reported to show substantial antitumor activity. This paper reports the synthesis of novel thioureidosulfaquinoxaline derivatives.
A. Budakoti +19 more
core +2 more sources
Journal of Heterocyclic Chemistry, 1973 AbstractThe treatment of 3β‐hydroxy‐16α‐bromo‐5α‐androstan‐17‐one, 3β‐acetoxy‐16α‐bromo‐5‐androsten‐17‐one and 21‐bromo‐5‐pregnen‐3β‐ol‐20‐one with 4,5‐dimethyl‐o‐phenylenediamine gave substituted quinoxalines.Hydrolysis of 3β‐acetoxy‐5‐androsteno[16,17‐b]‐6′,7′‐dimethylquinoxaline produced the corresponding 3β‐hydroxy compound.
openaire +2 more sources