7397-92-4Relevant academic research and scientific papers
BIARYL HYDROXYTHIOPHENE GROUP IV TRANSITION METAL POLYMERIZATION CATALYSTS WITH CHAIN TRANSFER CAPABILITY
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, (2022/02/05)
Catalyst systems that include a chain transfer agent and a metal-ligand complex according to formula (I).
Radical Alkyne peri-Annulation Reactions for the Synthesis of Functionalized Phenalenes, Benzanthrenes, and Olympicene
Tsvetkov, Nikolay P.,Gonzalez-Rodriguez, Edgar,Hughes, Audrey,dos Passos Gomes, Gabriel,White, Frankie D.,Kuriakose, Febin,Alabugin, Igor V.
, p. 3651 - 3655 (2018/03/06)
Radical cyclization reactions at a peri position were used for the synthesis of polyaromatic compounds. Depending on the choice of reaction conditions and substrate, this flexible approach led to Bu3Sn-substituted phenalene, benzanthrene, and olympicene derivatives. Subsequent reactions with electrophiles provided synthetic access to previously inaccessible functionalized polyaromatic compounds.
Syntheses and Absolute Stereochemistry of Chiral 9,10-Dihydro-9,10-ethanoanthracenes and their Tricarbonylchromium Complexes
Li, Z.,Werner, A.,Schloegl, K.
, p. 441 - 452 (2007/10/02)
Several chiral mono- and disubstituted 9,10-dihydro-9,10-ethanoanthracenes have been prepared from the corresponding anthracenes.Most of them were separated into enantiomers by chromatography on cellulose triacetate (CTA) and their absolute chiralities established by chiroptical comparison (via their CD spectra) with key compounds of known configuration.From the laevorotatory 1,5-dibromo derivative 16 the dextrorotatory dideuterio hydrocarbon (+)(9S,10S)-20 was obtained.Complexation of 2,6-dimethyl 9,10-dihydro-9,10-ethanoanthracene (+)-25, obtained by enantioselective chromatography on CTA , with Cr(CO)6 afforded two mono tricarbonylchromium complexes as well as the bis-exo,endo-complex (+)-28.Configurational assignments (exo,endo) are based on the absorption patterns of the bridge protons in the 1H NMR spectra. Keywords: (+)-1,5-Dideuterio-9,10-dihydro-9,10-ethanoanthracene; Enantioselective chromatography on CTA; Circular dichroism; Configurational correlation; Tricarbonylchromium complexes.
Isobenzofuran-Aryne Cycloadducts: Formation and Regioselective Conversion to Anthrones and Substituted Polycyclic Aromatics
Netka, Jill,Crump, Stephen L.,Rickborn, Bruce
, p. 1189 - 1199 (2007/10/02)
Several substituted anthracenes, benzanthracenes, dibenzanthracene, and more complex ring system derivatives are formed by the cycloaddition of 1,3-bis(trimethylsilyl)isobenzofuran (2) with arynes generated by LTMP-induced dehydrohalogenation of readily accessible haloaromatics.The cycloadducts undergo a novel acid-induced conversion to anthracenones.For several substrates this reaction is highly regioselective, allowing position specific introduction of another substituent at this stage.Reduction/dehydration of the anthrones provides an expeditious route to various polycyclic aromatic hydrocarbons.
