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Polycyclic Compounds (polycyclic + compound)

Distribution by Scientific Domains
Chemistry100%
Distribution within Chemistry
Organic Chemistry71%
General & Introductory Chemistry28%

Selected Abstracts

ChemInform Abstract: Lewis Acid Promoted Tandem Intermolecular Diels,Alder/Intramolecular Allylation Reactions of Silyl-Substituted 1,3-Butadienes Leading to Multisubstituted 7-Norbornenones and Related Polycyclic Compounds.

CHEMINFORM, Issue 21 2008
Dongzhen Li
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 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. [source]

Synthesis of Functionalized Polycyclic Compounds via a Novel Aromatic Oxy-Cope Rearrangement.

CHEMINFORM, Issue 17 2007
Syed Sulaiman Hussaini
Abstract ChemInform 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. [source]

Ruthenium- and Platinum-Catalyzed Sequential Reactions: Selective Synthesis of Fused Polycyclic Compounds from Propargylic Alcohols and Alkenes.

CHEMINFORM, Issue 16 2005
Yoshiaki Nishibayashi
No abstract is available for this article. [source]

ChemInform Abstract: Research on Potentially Bioactive Aza and Thiaza Polycyclic Compounds Containing a Bridgehead Nitrogen Atom.

CHEMINFORM, Issue 23 2001
Part 3.
Abstract ChemInform 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. [source]

Synthesis of Polycyclic Compounds by a Cascade Cycloisomerisation/Diels,Alder Reaction

CHEMISTRY - A EUROPEAN JOURNAL, Issue 24 2010
José Barluenga Prof.
Running rings around gold: A new cascade reaction catalysed by AuCl3 that is based upon an initial cycloisomerisation reaction of enynol or enynamine derivatives, which form 1,3-butadiene derivatives, followed by a Diels,Alder cycloaddition reaction to give fused or spirocyclic compounds is reported (see scheme). [source]

Cycloaddition Behavior of 1,2-Thiaphospholes: Reactions with Diazocumulenes and with Cyclopentadiene

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 10 2003
Jochen Kerth
Abstract 1,2-Thiaphospholes 3a,b react with (1-diazo-2-oxoalkyl)silanes 1a,c to form [1,2]thiaphospholo[2,,3,:3,4][1,3]diphospholo[1,5- b][1,2]thiaphosphole systems 4 with cis - anti - cis configuration of the tricyclic framework. They are accompanied by small amounts of compounds 5 that are presumably the cis - syn - cis isomers of 4, and 6-alkylidene-1-phospha-2-thiabicyclo[3.1.0]hex-3-enes 6. It is likely that these reactions proceed by [3+2] cycloaddition of diazocumulenes, which coexist with diazo compounds as minor equilibrium components, at the P=C bond of the heterophospholes, followed by N2 elimination and formation of short-lived 2-alkylidene-1,2(,5)thiaphospholes. The latter can either add to excess thiaphosphole to form the tricyclic products or undergo electrocyclization to form bicyclic alkylidenephosphiranes. Thiaphosphole 3a does not seem to react directly with cyclopentadiene in a [4+2] or [2+4] cycloaddition. Reaction with excess cyclopentadiene at 120 °C yields the polycyclic compounds 15 and 16, which are likely to arise from a Diels,Alder reaction of 3a, reacting as a heterodiene, with the cyclopentadiene dimer. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003) [source]

Synthesis of polycyclic polyfunctionalized carbocycles by a cobalt(I)-initiated tandem diels,alder reaction sequence,

ISRAEL JOURNAL OF CHEMISTRY, Issue 4 2001
Gerhard Hilt
The cobalt(I)-catalyzed neutral Diels,Alder reaction of acyclic 1,3-dienes with conjugated enynes can be used to generate secondary dihydroaromatic 1,4,8-trienes containing a 1,3-diene substructure, in good yields under mild reaction conditions. These 1,3-dienes can be converted, with reactive dienophiles in a tandem normal Diels,Alder reaction, into polycyclic compounds. In a similar tandem Diels,Alder sequence, the cobalt-catalyzed neutral homo Diels,Alder reaction of 2,5-norbornadiene can be used to generate polycyclic cycloaddition adducts. A sequential triple Diels,Alder reaction sequence can be realized when norbornadiene is reacted with the excess of the conjugated enynes under cobalt(I) catalysis. In a homo Diels,Alder, neutral Diels,Alder, normal Diels,Alder reaction sequence, the intermediately formed adducts are reacted with activated dienophiles to yield polycyclic compounds in a short sequence. The structures of several products were established by X-ray analysis. This showed that predominantly endo-products are formed in the tandem reaction sequences, while the exo-product becomes predominant in the triple Diels,Alder reaction sequence. [source]