STABILIZER COMPOUND, LIQUID CRYSTAL COMPOSITION, AND DISPLAY ELEMENT
申请人:DIC CORPORATION
公开号:US20180230094A1
公开(公告)日:2018-08-16
The present invention provides a compound represented by General Formula (I). The compound according to the present invention prevents the liquid crystal composition from being deteriorated due to light, has high compatibility with the liquid crystal composition, and does not impair the storage stability of the liquid crystal composition, thus the compound is useful as a constituent member of a liquid crystal composition. Since the liquid crystal composition and the liquid crystal display element containing the compound of the present invention exhibit UV resistance and have a high VHR, it is possible to obtain a liquid crystal display element with excellent display quality in which display defects such as burn-in and display unevenness do not occur or are suppressed.
In the title reaction, eight vic-dibromides and three vinylene dibromides gave the corresponding debromination products (alkenes and alkynes) at room temperature under neutral condition and an argon atmosphere. 2,3-Dibromosuccinic acid derivatives gave overreduction products or an unusual coupling dimer.
Dibenzotricycloöctadiene (I) yields on heating with dienophiles, Diels-Alderadducts (IV and V) and forms with oxygen a peroxide (VI). These reactions are explained by formation of an intermediate with an ortho-quinonoid structure (II). Polycyclic Diels-Alderadducts were obtained in good yields from a solution of benzocyclobutadiene and unstable hydrocarbons such as ortho-quinodimethane or 2,3-dihydronaphthalene
Electro-organic reactions. Part 54. Quinodimethane chemistry. Part 2. Electrogeneration and reactivity of o-quinodimethanes
作者:James H. P. Utley、Shalini Ramesh、Xavier Salvatella、Sabine Szunerits、Majid Motevalli、Merete F. Nielsen
DOI:10.1039/b007476o
日期:——
electrochemical generation and characterisation of a variety of o-quinodimethanes (o-QDMs) are described together with the outcome of preparative experiments in which they are key intermediates. The quinodimethanes are conveniently formed, in DMF, by both direct and redox-catalysed electroreduction of 1,2-bis(halomethyl)arenes. Their predominant reaction is polymerisation to poly(o-xylylene) (o-PX) polymers
Cyclopropane formation by electroreductive coupling of activated olefins and gem-polyhalo compounds
作者:Eric Léonel、Jean Paul Paugam、Sylvie Condon-Gueugnot、Jean-Yves Nédélec
DOI:10.1016/s0040-4020(98)00059-3
日期:1998.3
be involved to lead to the products. The radical anion of the olefin can react with the halo compound by electron-tranfer followed by radical coupling, or be reduced into the dianion which reacts by nucleophilicdisplacement.