Results 141 to 150 of about 42,788 (184)

Polycarbocyclic Bridged Ring Compounds

1991
Publisher Summary This chapter reviews significant advances in the synthesis and chemistry of polycarbocyclic bridged ring compounds. This class of compounds frequently possesses rigid structures whose carbocyclic frameworks contain varying degrees of steric strain and in recent years, highly region- and stereo selective methods have been developed ...
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Palladium(II) catalysed construction of tetrasubstituted carbon centres, and spiro and bridged-ring compounds from enamides of 2-lodobenzoic acids

Journal of the Chemical Society, Chemical Communications, 1986
Various N-vinyl- and N-allyl-amides of 2-iodobenzoic acid undergo catalytic cyclisation in the presence of tetraethylammonium chloride and a palladium acetate-based catalyst system to generate a range of synthetically useful structural features including tetrasubstituted carbon centres, and spiro- and bridged-ring compounds, and in which 5-exo-trig ...
Ronald Grigg, Visuvanathar Sridharan, Paul Stevenson, Tanachat Worakun   +3 more
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Bridged-ring nitrogen compounds. Part 1. A synthesis of a 2,3,4,5-tetrahydro-1, 4-ethano-1-benzazepin-5(1H)-one

Journal of the Chemical Society, Perkin Transactions 1, 1979
2, 3, 4, 5-Tetrahydro-1, 4-dimethyl-5-oxo-1-benzazepine has been obtained by methylation (Mel) of 2, 3, 4, 5-tetrahydro-5-oxo-1H-1-benzazepine using lithium di-isopropylamide, but a similar attempted alkylation reaction with 1, 2-di-iodoethane was unsuccessful.
Mary Lennon, George R. Proctor
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ChemInform Abstract: Palladium(II) Catalysed Construction of Tetrasubstituted Carbon Centres, and Spiro‐ and Bridged‐Ring Compounds from Enamides of 2‐Iodobenzoic Acids.

ChemInform, 1987
AbstractThe iodine‐substituted enamides (I), (IV), (VI), and (IX) are cyclized, yielding the compounds (II), (V), (VII), (VIII), and (X).
R. GRIGG, V. SRIDHARAN, P. STEVENSON, T. WORAKUN   +3 more
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ChemInform Abstract: BRIDGED‐RING NITROGEN COMPOUNDS. PART 4. SYNTHESIS AND APPLICATIONS OF 8‐ETHOXYCARBONYL‐6,7‐DIHYDRO‐2‐METHOXYBENZOCYCLOHEPTEN‐5‐ONE; PREPARATION OF METHANOBENZAZOCINES AND ETHANOBENZAZEPINES

Chemischer Informationsdienst, 1980
AbstractAusgehend von dem Methoxybenzaldehyd (I) und dem Diester (II) wird nach angegebener Reaktionsfolge das Benzosuberon (IVb) dargestellt, aus dem über den Alkohol (Va) das Keton (Vc) zugänglich ist.
G. R. PROCTOR, F. J. SMITH
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ChemInform Abstract: BRIDGED‐RING NITROGEN COMPOUNDS. PART 1. A SYNTHESIS OF A 2,3,4,5‐TETRAHYDRO‐1,4‐ETHANO‐1‐BENZAZEPIN‐5(1H)‐ONE

Chemischer Informationsdienst, 1979
AbstractDas Piperidinderivat (I) reagiert mit Dihydroresorcin zum Enamin (II), das in den Hydroxyester (III) übergeführt wird.
M. LENNON, G. R. PROCTOR
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Condensed cyclic and bridged-ring systems. Part IV. Stereochemically controlled synthesis of some endo-2-aryl-6-oxobicyclo[3.2.1]octanes and related compounds through intramolecular alkylations of γ^δ-unsaturated α′-diazomethyl ketones

J. Chem. Soc., Perkin Trans. 1, 1976
The 4-arylcyclohex-3-enecarboxylic acids (4a—d), prepared through a modified Diels–Alder reaction, have been converted via the corresponding diazomethyl ketones (5a—d) into cyclopropyl ketones (6a—d) and the 2-aryl-6-oxobicyclo[3.2.1]oct-2-ene derivatives (7a—d), by oxo-carbenoid addition and boron trifluoride–ether-catalysed cyclisation, respectively,
Usha R. Ghatak, Shaikh Khairul Alam, Prabir C. Chakraborti, Brindaban C. Ranu   +3 more
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ChemInform Abstract: CONDENSED CYCLIC AND BRIDGED‐RING SYSTEMS. PART IV. STEREOCHEMICALLY CONTROLLED SYNTHESIS OF SOME ENDO‐2‐ARYL‐6‐OXOBICYCLO(3.2.1)OCTANES AND RELATED COMPOUNDS THROUGH INTRAMOLECULAR ALKYLATIONS OF ΓΔ‐UNSATURATED α′‐DIAZOMETHYL KETONES

Chemischer Informationsdienst, 1976
AbstractAus den Phenyl‐methyl‐ketonen (I) und dem Grignard‐Reagenz (II) werden die ungesättigten Alkohole (III) erzeugt und mit den Acrylaten (IV) zu den Phenylcyclohexencarbonsäureestern (V) (Ausbeuteangaben in g) umgesetzt; die daraus erhaltenen freien Säuren (VI) werden in die Diazoketone (VII) übergeführt, deren photoinduzierte Zersetzung in ...
U. R. GHATAK, S. K. ALAM, P. C. CHAKRABORTI, B. C. RANU   +3 more
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Bridged Ring Compounds by Malonic Ester Synthesis

Synthetic Communications, 1977
P. A. Verbrugge, J. H. Tieleman, P. J. van der Jagt, F. Bickelhaupt   +3 more
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Bridged ring compounds. VIII. 1-Halobicyclo[2.2.-2]octanes

The Journal of Organic Chemistry, 1967
Zennosuke Suzuki, Kenichi Morita
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