Unusual stereoselectivity in the Diels-Alder addition of cyclopentadiene with the bicyclo[2.2.2]octene nucleus
摘要:
Cyclopentadiene adds to the substituted and electronically activated double bond of bicyclo[2.2.2]octa-2,5-diene-2,3-dicarboxylic anhydride with pronounced endo selectivity. Only two of the four possible stereoisomers were formed. The stereochemical course of the reaction was determined by X-ray crystallography and by a combination of chemical and spectroscopic techniques.
Unusual stereoselectivity in the Diels-Alder addition of cyclopentadiene with the bicyclo[2.2.2]octene nucleus
摘要:
Cyclopentadiene adds to the substituted and electronically activated double bond of bicyclo[2.2.2]octa-2,5-diene-2,3-dicarboxylic anhydride with pronounced endo selectivity. Only two of the four possible stereoisomers were formed. The stereochemical course of the reaction was determined by X-ray crystallography and by a combination of chemical and spectroscopic techniques.
LOW-MOLECULAR COMPOUND, POLYMER, ELECTRONIC-DEVICE MATERIAL, COMPOSITION FOR ELECTRONIC DEVICE, ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC SOLAR CELL ELEMENT, DISPLAY AND LIGHTING
申请人:Urano Toshiyuki
公开号:US20120193617A1
公开(公告)日:2012-08-02
A subject for the invention is to provide compounds where a film formation can be made by a wet film formation method, a heating temperature at the film formation is low, the film formed therefrom has high stability, and the other layers can be laminated thereon by a wet film formation method or another method. The compounds are usable as a material for electronic device which decreases little in charge transport efficiency or luminescent efficiency and which have excellent driving stability. The invention resides in a compound and a polymer which are characterized by having a elimination group of a specific structure and in an organic compound characterized by having a elimination group having a low elimination temperature.
[EN] SYNTHESIS OF POLYSUBSTITUTED AROMATIC COMPOUNDS AND AROMATISATION PROCESS FOR USE THEREIN<br/>[FR] SYNTHESE DE COMPOSES AROMATIQUES POLYSUBSTITUES ET PROCEDE D'AROMATISATION POUR CETTE SYNTHESE
申请人:——
公开号:WO1999050259A2
公开(公告)日:1999-10-07
[EN] In a retro-Diels-Alder reaction the starting cycloadduct is protected by -OH or -OP groups to form a desired benzene derivative or heteroaromatic compound, with the concomitant elimination of a dioxolene species. The protecting groups P are preferably comprised in a cyclic thiocarbonate or cis-isopropyldienedioxy group. The cycloadduct may be prepared by Diels-Alder cycloaddition of an acetylenic dienophile to a cyclohexadiene-cis-diol, and the cyclohexadiene may be formed by biological oxidation of an arene. The process allows desired aromatised products to be produced in uniformly high yields and the reaction is generally initiated at lower temperatures than known methods of synthesis which evolve ethylene. The by-products are usually non-volatile and may spontaneously polymerise. [FR] Dans une rétroréaction de Diels-Adler, le groupe de cycloaddition de départ est protégé par des groupes -OH ou OP de façon à former un dérivé benzène attendu ou un composé hétéroaromatique attendu, tout en éliminant une espèce dioxolène. Les groupes de protection P sont de préférence compris dans un groupe thiocarbonate cyclique ou cis-isopropyldiènedioxy. Le groupe de cycloaddition peut être obtenu par cycloaddition Diels-Adler d'un diénophile acétylénique à un cyclohexadiène-cis-diol, le cyclohexadiène pouvant être formé par oxydation biologique d'un arène. Ce procédé permet de produire avec des rendements uniformément élevés des produits aromatisés attendus. La réaction démarre à des températures généralement plus basses que dans le cas des techniques connues de synthèse qui font évoluer l'éthylène. Les sous-produits, qui sont généralement non-volatils, peuvent se polymériser spontanément.
Unusual stereoselectivity in the Diels-Alder addition of cyclopentadiene with the bicyclo[2.2.2]octene nucleus
作者:Richard Vaughan Williams、Murali Mohan Reddy Todime、Paul Enemark、Dick van der Helm、Safia Khalil Rizvi
DOI:10.1021/jo00076a039
日期:1993.11
Cyclopentadiene adds to the substituted and electronically activated double bond of bicyclo[2.2.2]octa-2,5-diene-2,3-dicarboxylic anhydride with pronounced endo selectivity. Only two of the four possible stereoisomers were formed. The stereochemical course of the reaction was determined by X-ray crystallography and by a combination of chemical and spectroscopic techniques.