Results 171 to 180 of about 23,920 (210)

ChemInform Abstract: Palladium‐Catalyzed Coupling Reactions of Thioimidate N‐Oxides: Access to α‐Alkenyl‐ and α‐Aryl‐Functionalized Cyclic Nitrones.

ChemInform, 2010
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Julie Schleiss, Patrick Rollin, Arnaud Tatibouet   +2 more
openaire   +1 more source

Bicyclic 1,2-oxazine N-oxides. Different behaviour in ring fission between systems derived from 5- and 6-membered ring cyclic enamines

Tetrahedron, 1982
Abstract 1,2-Oxazine N-oxides derived from aminocyclohexenes open into the corresponding nitroalkylated trisubstituted enamines, whereas those derived from aminocyclopentenes give stable tetrasubstituted enamines. Both open-chain systems are easily hydrolyzed to the corresponding γ-nitrocycloalkanones.
DANEO S., PITACCO, GIULIANA, RISALITI A., VALENTIN, ENNIO   +3 more
openaire   +2 more sources

ChemInform Abstract: A Novel and Efficient Deoxygenation of Hetero Cyclic N‐Oxides Using ZrCl₄/NaBH₄.

ChemInform, 2000
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
K. Purushothama Chary, G. Hari Mohan, D. S. Iyengar   +2 more
openaire   +1 more source

ChemInform Abstract: NMR Spectra of Cyclic Nitrones. Part 4. Synthesis and 13C NMR Spectra of 4H‐Imidazole N‐Oxides and N,N‐Dioxides.

ChemInform, 1989
AbstractOxidation of the 1‐hydroxy‐3‐imidazoline 3‐oxides (I) or the 1‐hydroxy‐3‐imidazolines (IIIa) and (IIIc) gives the dioxides (II) or the 4H‐imidazole 3‐monoxides (IVa) and (IVc).
I. A. GRIGOR'EV, L. A. KIRILYUK, L. B. VOLODARSKII   +2 more
openaire   +1 more source

Formation of a cyclic adenine adduct with a 4-nitroquinoline N-oxide metabolite model.

IARC scientific publications, 1987
Pentacyclic adducts are obtained in the reaction of adenine derivatives with the diacetyl ester of 4-hydroxyamino quinoline oxide, the postulated metabolite of the potent carcinogen, 4-nitroquinoline N-oxide (4-NQO).
N, Tohme, M, Demeunynck, M F, Lhomme, J, Lhomme   +3 more
openaire   +1 more source

ChemInform Abstract: THERMAL REARRANGEMENTS OF CYCLIC AMINE YLIDES. IV. REARRANGEMENT OF β,Γ‐UNSATURATED 1‐ALKYLPIPERIDINE N‐OXIDES: FORMATION OF 1,2‐OXAZEPINE DERIVATIVES

Chemischer Informationsdienst, 1985
AbstractDie thermische Umlagerung der aus den Verbindungen (I) und (III) dargestellten N‐Oxide (II) und (IV) führt unter Ringerweiterung zu den Oxazepinen (V), (VI), (IX) und (X).
H. SASHIDA, T. TSUCHIYA
openaire   +1 more source

ChemInform Abstract: 2‐CHLORO‐4,5‐DIHYDROIMIDAZOLE; I. REACTIONS WITH SOME HETEROAROMATIC N‐OXIDES, CYCLIC NITRONES, AND ALDOXIMES

Chemischer Informationsdienst, 1984
Abstract2‐Chlorimidazolin ( l) reagiert mit Chinolin‐ N‐oxiden (II) über die Zwischenstufe cyclischer Addukte zu 2‐lmidazolidinon‐Derivaten (III) und (IV).
openaire   +1 more source

ChemInform Abstract: Synthesis of (3S,4R)‐3,4‐Isopropylidenedioxy‐1‐pyrroline‐N‐oxide, an Enantiopure Functionalized Cyclic Nitrone; Cycloaddition Reactions with Dimethyl Maleate and Dimethyl Fumarate.

ChemInform, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
M. CLOSA, R. H. WIGHTMAN
openaire   +1 more source

Desymmetrization of Cyclicmeso-Epoxides with Silicon Tetrachloride Catalyzed by PINDOX, a Chiral Bipyridine Mono-N-oxide

Organic Letters, 2009
PINDOX 8 has been identified as a chiral organocatalyst for the enantioselective ring-opening of cyclic meso-epoxides with SiCl(4) to produce chlorohydrins in up to 90% ee. The catalyst is most effective with saturated cyclic substrates containing more than seven carbon units.
Andrei V, Malkov, Malcolm R, Gordon, Sigitas, Stoncius, Javid, Hussain, Pavel, Kocovský   +4 more
openaire   +2 more sources

ChemInform Abstract: Cycloaddition/Ring Opening of 3‐Unsubstituted Cyclic Nitronates, Isoxazoline and 5,6‐Dihydro‐4H‐1,2‐oxazine N‐Oxides, as Synthetic Equivalents of Functionalized Nitrile Oxides.

ChemInform, 1999
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
S. KANEMASA, T. YOSHIMIYA, E. WADA
openaire   +1 more source