Microwave-Assisted Efficient Synthesis of 2-Hydroxydeoxybenzoins from the Alkali Degradation of Readily Prepared 3-Aryl-4-hydroxycoumarins in Water
作者:Zhong-Zhen Zhou、Guang-Hua Yan、Wen-Hua Chen、Xue-Mei Yang
DOI:10.1248/cpb.c13-00604
日期:——
This paper describes an operationally simple, green and efficient approach for the synthesis of 2-hydroxydeoxybenzoins bearing diverse substituents from the microwave-assisted alkali degradation of 3-aryl-4-hydroxycoumarins in water. The latter compounds were readily prepared from the intramolecular Claisen condensation reaction of methyl 2-(2-arylacetoxy)benzoates in the presence of Cs2CO3-acetone
本文描述了一种操作简单,绿色高效的方法,该方法可通过微波辅助的3-芳基-4-羟基香豆素在水中的碱降解来合成带有各种取代基的2-羟基脱氧安息香素。后者的化合物很容易从2-(2-芳基乙酰氧基)苯甲酸甲酯的分子内克莱森缩合反应中,在Cs2CO3-丙酮存在下,以极好的收率和费力的后处理步骤制备。该方法是高度原子经济的,因此可用于大规模合成2-羟基脱氧苯偶姻。