direct insertion of alkenes into unstrained ring 2-aryl-1,3-indandiones is reported, which provides a one-carbon ring expansion strategy for the synthesis of 1,4-naphthoquinones. Entirely differing from the existing reports, the alkenes herein behave as C1 units to participate in annulation reactions. This transformation provides a facile route to access a class of highly functionalized 1,4-naphthoquinones
Naphthoquinone derivative and electrophotosensitive material using the same
申请人:MITA INDUSTRIAL CO. LTD.
公开号:EP0764886A2
公开(公告)日:1997-03-26
The present invention provides a naphthoquinone derivative represented by the general formula (I):
wherein R1 and R2 are as defined in the specification. An electrophotosensitive material containing this naphthoquinone derivative as an electron transferring material has high sensitivity.
Naphthoquinone derivatives and electro-photosensitive material using same
申请人:MITA INDUSTRIAL CO. LTD.
公开号:EP0879811A1
公开(公告)日:1998-11-25
A novel dinaphthoquinone derivative suited for use as an electron-transporting agent, and a highly sensitive electro-photosensitive material using the same dinaphthoquinone derivative. The naphthoquinone derivative is represented by the general formula (1),
wherein R1 is an aryl group that may have a substituent, and R2 is an alkylene group that may have a substituent or an arylene group that may have a substituent.
The derivative is contained, as an electron-transporting agent, in the photosensitive layer of the electro-photosensitive material.
An intermolecular annulation reaction of 2‐aryl‐1,3‐indandions with alkynes was reported using Pd(OAc)2 to access spirobi[indene]‐1,3‐diones. Under palladium catalysis, the substrates form a homocoupling dimer intermediate through a catalytic dehydrogenativecross‐coupling process. The palladium(II) species could come from dimer or 2‐aryl‐1,3‐indandion. Notably, this pathway is not typically observed
据报道,使用 Pd(OAc)2 进行 2-芳基-1,3-茚满二酮与炔烃的分子间成环反应,得到螺二[茚]-1,3-二酮。在钯催化下,底物通过催化脱氢交叉偶联过程形成同偶联二聚体中间体。钯 (II) 物质可能来自二聚体或 2-芳基-1,3-茚满二酮。值得注意的是,这种途径通常在烯醇导向的形式 sp3 C-H 官能化/氧化成环钯化学中观察不到。这种转化提供了获得一类官能化螺环碳环茚的途径。