Solvent-switchable regioselective 1,2- or 1,6-addition of quinones with boronic acids
作者:Qi Xia、Yaxuan Zhou、Xiaoning Yang、Yanqiu Zhang、Jiayi Wang、Gonghua Song
DOI:10.1039/d3cc01968c
日期:——
An efficient copper-catalyzed solvent-switchable regioselective 1,2- or 1,6-addition of quinones with boronic acids has been developed. This novel catalytic protocol for the synthesis of various quinols and 4-phenoxyphenols was enabled by a simple solvent swap between H2O and MeOH. It features mild reaction conditions, simple and easy operation, broad substrate scope and excellent regioselectivity
已经开发出一种有效的铜催化溶剂可转换的醌与硼酸的区域选择性 1,2-或 1,6-加成反应。这种用于合成各种对苯二酚和 4-苯氧基苯酚的新颖催化方案是通过 H 2 O 和 MeOH 之间的简单溶剂交换实现的。其具有反应条件温和、操作简单易行、底物范围广、区域选择性优良等特点。还成功地研究了克级反应以及两种加成产物的进一步转化。
Oxidation of 4-arylphenol trimethylsilyl ethers to p-arylquinols using hypervalent iodine(III) reagents
作者:François-Xavier Felpin
DOI:10.1016/j.tetlet.2006.11.073
日期:2007.1
An efficient synthesis of p-arylquinols by the oxidation of 4-arylphenol trimethylsilyl ethers with phenyliodine(III) diacetate (PIDA) is reported. This protocol greatly improved the yield of p-quinol by minimizing oligomer side products compared to the oxidation of free phenol with hypervalentiodine(III) reagents. The innocuity of phenyliodine(III) diacetate associated with the mild conditions make
The acid–base organocatalyzed intramolecularRauhut–Currier (RC) reaction of the dienone enolates has been developed. The enantioselective RC process produces the highly functionalized α-methylidene-γ-butyrolactones as a single diastereomer with up to 98% ee.