Download e-book for kindle: Carbon Rich Compounds I by Prof. Armin de Meijere (auth.)

By Prof. Armin de Meijere (auth.)

ISBN-10: 3540641106

ISBN-13: 9783540641100

Carbon wealthy Compounds are outlined the following as carbon skeletons with a carbon to hydrogen ratio of 1:(=<1) including all-carbon compounds (i.e. carbon allotropes). the present quantity covers glossy equipment for the education and transformation of polycyclic fragrant compounds together with substructures of C60-fullerene and novel hugely advanced cyclophanes. A graph theoretical therapy provides a substitution rule, permitting the outline of already present buildings and in addition the definition of latest difficult artificial objectives. within the moment a part of this quantity, the synthesis and detailed chemistry of oligocyclic compounds which includes 5- and 6-membered jewelry, so-called centro-polyhydrindanes in addition to oligoquinanes, specifically hugely unsaturated ones, are discussed.

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1 3 1a 4 (51%) 2 (30 %) 5 (11 %) Scheme 2. Thermal cyclodehydrogenation reactions of stilbene type aromatics [37, 38]; a) toluene (p =7 mbar) as carrier gas and radical scavenger 51 Modern Routes to Extended Aromatic Compounds 4 6 8 9 7 10 Scheme 3. g. the ring closure of dibenzo[de,hi]fluoreno[2,1,9,8,7-mnopqr]naphthacene (9) to the fullerene-C78 subunit difluoreno[2,1,9,8,7-defghi;2¢,1¢,9¢,8¢,7¢-mnopqr]naphthacene (10, Scheme 3, [40]). It is assumed that the cyclization is initiated by random H-abstraction from the polycyclic hydrocarbons and that the aryl radicals generated in the fjord regions undergo a radical cycloaddition reaction to form the new C-C bond in the more condensed PAH [38 –41].

73 7 Directed Electrophilic Cyclization Reactions . . . . . . . 76 8 Miscellaneous . . . . . . . . . . . . . . . 4 Centrohexaindane . . . . . . . . . . Anions of PAHs as Synthetic Precursors . . . Ring Transformations of Heterocyclic Compounds The Dötz Reaction . . . . . . . . . 9 References . . . . . . . . . . . . . . . . 82 . . . . . . . . . . . . . . . . . . . . . . . . Abbreviations Ac Ar Bu cod Cp DA dba DDQ DMA DME DMF DMG DNA dppp EPR Et FMOC FP FVP HMPA ISNA ISPAC L Me NMR acetyl aryl butyl 1,5-cyclooctadiene cyclopentadienyl Diels-Alder reaction dibenzylideneacetone 2,3-dichloro-5,6-dicyanobenzoquinone N,N-dimethylacetamide 1,2-dimethoxyethane N,N-dimethylformamide directing metallation group de(s)oxyribonucleic acid 1,3-bis(diphenylphosphino)propane electron paramagnetic resonance (spectroscopy) ethyl fluorenylmethoxycarbonyl flow pyrolysis flash vacuum pyrolysis hexamethylphosphoric triamide International Symposium on Novel Aromatics International Symposium on Polycyclic Aromatic Compounds ligand methyl nuclear magnetic resonance (spectroscopy) .

59 . . . . . . . . . . . . . . 1 Reductive Coupling Reactions . . . . . . . . 1 Aryl-Aryl Coupling Reactions . . . . . . . . 2 Additional Reductive Coupling Reactions for the Synthesis of PAHs . . . . . . . . . . 1 Intermolecular Reactions . . . . . . . . . . 2 Intramolecular Reactions . . . . . . . . . . 3 Intermolecular Cross Coupling Reactions between Aromatic Electrophiles and Nucleophiles . . . . . . . . . . . . . . . 50 52 53 55 .

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Carbon Rich Compounds I by Prof. Armin de Meijere (auth.)


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