A convenient single-step synthesis of various symmetrically substituted 1,3-diarylisobenzofurans from readily available 3-methoxy-3H-isobenzofuran-1-one (1a) and two equivalents of aryl Grignard reagents is described. The title compounds are obtained in medium to high isolated yields. Crude isobenzofuran has also been trapped by maleimide, furnishing pure Diels-Alder adduct almost quantitatively.
A new synthetic route to substituted tetracenes and pentacenes via stereoselective [4+2] cycloadditions of 1,4-dihydro-1,4-epoxynaphthalene and isobenzofuran
Stereoselective [4+2] cycloadditions of 1,4-dihydro-1,4-epoxynaphthalene and isobenzofuran were described. Among several possibilities, syn-exo and/or anti-endo isomers were selectively produced depending on the substitution pattern of the reactants. Importantly, the syn-exo isomer underwent acid promoted aromatization, affording the corresponding tetracene. These findings enabled us to prepare a substituted
POLYCYCLIC AROMATIC COMPOUND, MATERIAL FOR AN ORGANIC DEVICE, ORGANIC ELECTROLUMINESCENT ELEMENT, DISPLAY APPARATUS AND LIGHTING APPARATUS
申请人:Kwansei Gakuin Educational Foundation
公开号:US20200207787A1
公开(公告)日:2020-07-02
A polycyclic aromatic compound in which a plurality of aromatic rings are connected by a boron atom and an oxygen atom, a sulfur atom or a selenium atom and substituted by a specific aryl such as anthracene, is useful as a material for an organic device. By the polycyclic aromatic compound, an organic EL device having at least one of efficiency and device life can be provided.
By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are linked via a boron atom, a nitrogen atom, or the like, options of a material for an organic EL element are increased. In addition, by using the novel polycyclic aromatic compound as a material for an organic electroluminescent element, an excellent organic EL element is provided.
By manufacturing an organic EL element using a material for a light emitting layer including a pyrene-based compound represented by the following formula (2) as a host material and a polycyclic aromatic compound in which a plurality of aromatic rings is linked with a boron atom and a nitrogen atom or an oxygen atom as a dopant material, an organic EL element having, for example, excellent light emission efficiency is provided.
In the above formula (2), at least one hydrogen atom in a pyrene moiety may be substituted by an aryl having 6 to 10 carbon atoms or the like. Ar represents an aryl having 14 to 40 carbon atoms or a heteroaryl having 12 to 40 carbon atoms. These groups may be substituted by an aryl having 6 to 10 carbon atoms or the like. s and p each independently represent an integer of 1 or 2. s and p do not simultaneously represent 2. One or more hydrogen atoms in a compound represented by formula (2) may be each independently substituted by a halogen atom, cyano, or a deuterium atom.