DABCO-Assisted Coupling of Some Activated Olefins and 2,3-Dihalo-1,4-naphthoquinones and Conversion to the Anthraquinone Derivatives
作者:Kee-Jung Lee、Chang Lee
DOI:10.1055/s-2004-829147
日期:——
A new synthesis of mono- and di-α-vinylnaphthoquinones based on stepwise or one-pot substitution of the halogens in 2,3-dihalo-1,4-naphthoquinones by DABCO-assisted enolate ion is described. Di-α-vinylnaphthoquinones undergo thermal 6Ï electrocyclization to yield 1,4-disubstituted anthraquinones readily.
描述了一种基于 DABCO 辅助烯醇离子逐步或一锅取代 2,3-二卤-1,4-萘醌中的卤素的单-和二-α-乙烯基萘醌的新合成方法。二-α-乙烯基萘醌经过热6α电环化很容易产生1,4-二取代蒽醌。