Results 251 to 260 of about 86,821 (289)

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
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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
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ChemInform Abstract: Six‐Membered Cyclic Nitrone Spin Traps. Part 1. Novel Reactions of 2‐ Methyl‐3,4,5,6‐tetrahydropyridine N‐Oxide with Some Organolithium and Grignard Reagents.

ChemInform, 1991
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.
Y.‐K. ZHANG, G.‐Z. XU
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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
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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
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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
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One‐Pot Synthesis of Substituted Indole N‐Oxides: TiCl₄‐Mediated Baylis—Hillman Reaction of α‐Oxo Cyclic Ketene‐S,S‐acetal with o‐Nitrobenzaldehydes and Subsequent Intramolecular Cyclization.

ChemInform, 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.
Wei Pan, Dewen Dong, Shaoguang Sun, Qun Liu   +3 more
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Enantioselective Addition of Cyclic Enol Silyl Ethers to 2‐Alkenoyl‐Pyridine‐N‐Oxides Catalysed by Cu^II–Bis(oxazoline) Complexes

Chemistry – A European Journal, 2012
AbstractAsymmetric reactions involving (E)‐3‐aryl‐1‐(pyridin‐2‐yl‐N‐oxide)prop‐2‐en‐1‐ones and cyclic enol silyl ethers show good yields and excellent enantioselectivities (up to 99.9 % ee) when catalysed by bis(oxazoline)–CuII complexes. Different reaction pathways can be followed by different enol silyl ethers: with 2‐(trimethylsilyloxy)furan, a ...
LIVIERI, ALESSANDRO, BOIOCCHI, MASSIMO, DESIMONI, GIOVANNI, FAITA, GIUSEPPE   +3 more
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In vivo redox poising of the cyclic electron transport system of Rhodobacter capsulatus and the effects of the auxiliary oxidants, nitrate, nitrous oxide and trimethylamine N-oxide, as revealed by multiple short flash excitation

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1990
Abstract Intact cells of Rhodobacter capsulatus in the presence of myxothiazol were exposed to trains of short flashes of saturating light and the pattern of the absorbance changes due to P870, cytochrome ( c 1 + c 2 ) and the carotenoids that report on the membrane potential were monitored.
Jones, M. R., Richardson, D. J., McEwan, A. G., Ferguson, S. J., Jackson, J. B.   +4 more
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Cyclic Nitrone Free Radical Traps:  Isolation, Identification, and Synthesis of 3,3-Dimethyl-3,4-dihydroisoquinolin-4-ol N-Oxide, a Metabolite with Reduced Side Effects

Journal of Medicinal Chemistry, 1996
A C-4 hydroxylated metabolite (2, 3,3-dimethyl-3,4-dihydroisoquinolin-4-ol N-oxide) of the previously described cyclic nitrone free radical trap 1 (3,3-dimethyl-3,4-dihydroisoquinoline N-oxide, a cyclic analog of phenyl-tert-butylnitrone (PBN)) was isolated, identified, and synthesized.
C E, Thomas, P, Bernardelli, S M, Bowen, S F, Chaney, D, Friedrich, D A, Janowick, B K, Jones, F J, Keeley, J H, Kehne, B, Ketteler, D F, Ohlweiler, L A, Paquette, D J, Robke, T L, Fevig   +13 more
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