酚类的氧化是广泛研究的主题,但很少有具有化学和区域选择性的催化需氧实例。在这里,我们描述了在铜 (Cu) 催化的有氧条件下苯酚的正氧化或氧化偶联的条件,这些条件会产生邻醌、双酚或苯并氧杂环庚烷。We demonstrate that each product class can be accessed selectively by the appropriate choice of Cu(I) salt, amine ligand, desiccant and reaction temperature. 此外,我们评估了取代基对苯酚的影响,并证明了它们对原氧化和氧化偶联途径之间选择性的影响。
酚类的氧化是广泛研究的主题,但很少有具有化学和区域选择性的催化需氧实例。在这里,我们描述了在铜 (Cu) 催化的有氧条件下苯酚的正氧化或氧化偶联的条件,这些条件会产生邻醌、双酚或苯并氧杂环庚烷。We demonstrate that each product class can be accessed selectively by the appropriate choice of Cu(I) salt, amine ligand, desiccant and reaction temperature. 此外,我们评估了取代基对苯酚的影响,并证明了它们对原氧化和氧化偶联途径之间选择性的影响。
The present invention provides a compound of general Formula (I) having histone deacetylase (HDAC) inhibitory activity, a pharmaceutical composition comprising the compound, and a method useful to treat diseases using the compound.
The present invention provides a compound of general Formula (I) having histone deacetylase (HDAC) inhibitory activity, a pharmaceutical composition comprising the compound, and a method useful to treat diseases using the compound.
Oxidant‐Controlled Catalytic Transformations of Phenols with Unexpected Cleavage of Aromatic Rings
作者:Wei Li、Feijie Song、Jingsong You
DOI:10.1002/chem.201501826
日期:2015.9.28
homocoupling/skeletal rearrangement of phenols that realizes the cleavage of the phenolring by using air or Ag2CO3 as the oxidant. Interestingly, simply changing the oxidant to K2S2O8 results in the oxidative coupling/cyclization of phenols to give dibenzofurans. These results set an important precedent of oxidant‐controlledcatalytictransformations of phenols.
苯酚的氧化转化由于其在生物过程和有机合成中的重要性而引起了化学家的极大关注。与酚的相对发达的氧合和偶联反应相反,酚的高效和选择性氧化环裂解的代表性不足。这项工作描述了一种新颖的CuCl催化的苯酚串联均质偶联/骨架重排,它可以通过使用空气或Ag 2 CO 3作为氧化剂来实现苯酚环的裂解。有趣的是,只需将氧化剂更改为K 2 S 2 O 8导致苯酚的氧化偶联/环化生成二苯并呋喃。这些结果为酚的氧化剂控制的催化转化开创了重要的先例。