Copper-Catalyzed Intramolecular Oxidative 6-exo-trig Cyclization of 1,6-Enynes with H2O and O2
作者:Zhi-Qiang Wang、Wen-Wu Zhang、Lu-Bin Gong、Ri-Yuan Tang、Xu-Heng Yang、Yu Liu、Jin-Heng Li
DOI:10.1002/anie.201104082
日期:2011.9.12
The novel CuCl2‐catalyzed title reaction of enynes has been developed for synthesizing substituted naphthoquinones (see scheme; DMA=dimethylacetamide). The method represents the first example of a copper‐catalyzed enyne oxidative cyclization for constructing 1,4‐naphthoquinones by the incorporation of two oxygen atoms into the organic framework from molecular oxygen and water.
The present invention provides a naphthoquinone derivative represented by the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification. An electrophotosensitive material containing this naphthoquinone derivative as an electron transferring material has high sensitivity.
Naphthoquinone derivative and electrophotosensitive material using same
申请人:Mita Industrial Co., Ltd.
公开号:US05994012A1
公开(公告)日:1999-11-30
The present invention provides a naphthoquinone derivative represented by the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification. An electrophotosensitive material containing this naphthoquinone derivative as an electron transferring material has high sensitivity.
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.