Synthesis of Annulated Arenes and Heteroarenes by Hydriodic Acid and Red Phosphorus Mediated Reductive Cyclization of 2-(Hetero)aroylbenzoic Acids or 3-(Hetero)arylphthalides
作者:Arasambattu Mohanakrishnan、Settu Rafiq
DOI:10.1055/s-0036-1588337
日期:——
Annulated arenes and hetarenes were prepared in good to very good yields by hydriodic acid/red phosphorus mediated reductive cyclization of 3-(hetero)aryl phthalides. The reductive cyclization also proceeded successfully with 2-aroylbenzoic acids and 2-aroylnaphthoic acids.
Direct synthesis of anthracenes from o-tolualdehydes and aryl iodides through Pd(II)-Catalyzed sp C H arylation and electrophilic aromatic cyclization
作者:Hyojin Park、Kwangho Yoo、Byunghyuck Jung、Min Kim
DOI:10.1016/j.tet.2018.03.006
日期:2018.4
The first direct synthesis of substituted anthracenes from o-tolualdehydes and aryl iodides via a Pd(II)-catalyzed CH arylation using an alcohol-bearing transient directing group and subsequent AgOTf-assisted electrophilic aromatic cyclization is described. New transient directing groups consisting of amino acids and amino alcohols enhanced the reactivity, and the CH arylation was complete in 12 h
A new InCl3-catalyzed reduction of anthrones and anthraquinones by using aluminum powder in aqueous media
作者:Chunyan Wang、Jieping Wan、Zhiguo Zheng、Yuanjiang Pan
DOI:10.1016/j.tet.2007.03.113
日期:2007.6
InCl3-catalyzed reduction of anthrones and anthraquinones was investigated under different conditions. A new synthetic method for anthracenes in aqueous media under mild conditions is described.
An efficient reduction of anthrones to anthracenes
作者:Donald J. Marquardt、Frankie A. McCormick
DOI:10.1016/0040-4039(94)88004-2
日期:1994.2
An efficient and general means of reducing anthrones to anthracenes has been developed. The procedure, which uses NaBH4 as the reducing agent in a mixed solvent system of diglyme/methanol, produced anthracenes in essentially quantitative yield from a variety of anthrones.