Copper-catalyzed ortho-acylation of phenols with aryl aldehydes and its application in one-step preparation of xanthones
作者:Jun Hu、Enoch A. Adogla、Yong Ju、Daping Fan、Qian Wang
DOI:10.1039/c2cc36176k
日期:——
In the presence of triphenylphosphine, copper(II) chloride can catalyze an intermolecular ortho-acylation reaction of phenols with aryl aldehydes. The reaction proceeds smoothly with a wide range of starting materials, and furthermore, it can be used to synthesize xanthone derivatives in a single step in high yields.
Methods are provided for forming a xanthone derivative via reacting a 2-substituted benzaldehyde with a phenol derivative to form the xanthone derivative.
提供了一种方法,通过将2-取代苯甲醛与酚衍生物反应来形成黄酮衍生物。
BeCl2 as a new highly selective reagent for dealkylation of aryl-methyl ethers
作者:Hashem Sharghi、Fatemeh Tamaddon
DOI:10.1016/0040-4020(96)00815-0
日期:1996.10
An efficient and simple method is introduced for the selective removal of methyl group from poly aryl-methyl ethers, in some important derivatives of benzophenones, xanthones, anthraquinones, aryl esters, benzamides and nitroanisoles with BeCl2.