Chromium-Catalyzed Regioselective Kumada Arylative Cross-Coupling of C(aryl)–O Bonds with a Traceless Activation Strategy
摘要:
We report here the chromium-catalyzed regioselective Kumada arylative cross-coupling of C(aryl)-O bonds at ambient temperature. By using a simple and low-cost chromium(II) chloride salt as a precatalyst, accompanied by a 2-pyridyl ligation, the catalytic cleavage and arylative coupling of C(aryl)-O bonds were achieved with a traceless activation strategy, overcoming the regioselectivity obstacle when several C-O bonds coexist in the Kumada coupling system.
Decarboxylation, during their aromatization by Pd/C, of some 3,4-octahydronaphtho-7,8-benzocoumarins
作者:K. Chebaane、M. Guyot
DOI:10.1016/0040-4020(77)80188-9
日期:1977.1
Some 3',4'-cyclohexa-1',2'-dihydro- and 1',2'-cyclohexa-3',4'-dihydro-3,4,7,8-dibenzocoumarins 2 and 3 were prepared by catalytic condensation between a naphthol and a α-carbethoxy-cis- decalone (−1 or −2). These compounds, when treated with Pd/C at 260°, undergo, beside aromatization, a complete decarboxylation of the lactone ring. A mechanism, involving H transfer through a π-allylic palladium complex
Anthracene compound and organic electroluminescence element using same
申请人:Ono Yohei
公开号:US09070885B2
公开(公告)日:2015-06-30
Provided is an organic electroluminescence element having superior element service life. An anthracene compound in which an aryl group having C10 or greater is bonded to the 9-position and a naphthyl group is bonded to the 10-position, wherein a compound in which a specific aryl group has been substituted, in particular, at the 7-position of the naphthyl group (which is bonded at the 2-position thereof to the anthracene) is used as a material for a luminescence layer to produce the organic electroluminescence element.
Chiral compounds of formula I
wherein the paramters have the meaning given in claim 1, liquid crystal mixtures comprising at least one chiral compound of formula I, to chiral linear or crosslinked liquid crystal polymers obtainable by polymerizing a polymerizable mixture comprising at least one chiral compound of formula I, to the use of chiral compound of formula I and mixtures and polymers obtained thereof in liquid crystal displays, active and passive optical elements, adhesives, synthetic resins with anisotropic mechanical properties, cosmetic and pharmaceutical compositions, diagnostics, liquid crystal pigments, for decorative and security applications, nonlinear optics, optical information storage or as chiral dopants, and a liquid crystal display comprising a mixture comprising at least one chiral compound of formula I.
式 I 的手性化合物
其中参数具有权利要求 1 中给出的含义,包括至少一种式 I 手性化合物的液晶混合物,通过聚合包含至少一种式 I 手性化合物的可聚合混合物而获得的手性线性或交联液晶聚合物,以及式 I 手性化合物及其混合物和聚合物在液晶显示器中的应用、主动和被动光学元件、粘合剂、具有各向异性机械性能的合成树脂、化妆品和药物成分、诊断、液晶颜料、装饰和安全应用、非线性光学、光学信息存储或作为手性掺杂剂,以及包含至少一种式 I 手性化合物的混合物的液晶显示器。
JP2018538236A5
申请人:——
公开号:JP2018538236A5
公开(公告)日:2018-12-27
CHEBAANE K.; GUYOT M., TETRAHEDRON, 1977, 33, NO 7, 757-760