Gold-Catalyzed Fluorination-Hydration: Synthesis of α-Fluorobenzofuranones from 2-Alkynylphenol Derivatives
作者:Qiang Wang、Yu Jiang、Run Sun、Xiang-Ying Tang、Min Shi
DOI:10.1002/chem.201602545
日期:2016.10.4
The AuI‐catalyzed fluorination–hydration of 2‐alkynylphenol derivatives in the presence of Selectfluor [1‐chloromethyl‐4‐fluoro‐1,4‐diazoniabicyclo‐[2.2.2]octane bis(tetrafluoroborate)] has been developed. This method provides straightforward access to α‐fluorobenzofuranones with the construction of C−O, C=O, and C−F bonds in a single step on the basis of an AuI/AuIII redox catalytic cycle. Several
在Au我催化的2- alkynylphenol衍生物的氟化水合的Selectfluor的存在[1-氯甲基-4-氟-1,4- diazoniabicyclo- [2.2.2]辛烷双(四氟硼酸盐)]已被开发。该方法可在Au I / Au III氧化还原催化循环的基础上,一步一步直接获得具有C-O,C = O和C-F键的α-氟苯并呋喃酮。还进行了一些对照实验,包括该反应的不对称变体,以深入了解反应机理。
A practical ortho-rearrangement of silyl group of ortho-bromophenyl silyl ethers using magnesium(0)
phenol from ortho-bromophenyl silylethers without using RLi is described. Various ortho-bromophenyl silylethers are treated with commercially available Mg turnings, which are easy to handle in air, and transfer of the silyl group to the ortho-position occurs in good to high yields. Selective mono-magnesiation of 2,6-dibromophenyl silylether is observed even in the presence of excess Mg, and ortho-bromo-6-silylphenol
描述了不使用RLi由邻-溴苯基甲硅烷基醚实际合成邻-甲硅烷基取代的苯酚的方法。各种邻-溴苯基甲硅烷基醚用市售的Mg车削剂处理,易在空气中处理,并且甲硅烷基转移至邻位的收率高至高。即使在存在过量的Mg的情况下,也观察到2,6-二溴苯基甲硅烷基醚的选择性单放大,并且获得了邻溴-6-甲硅烷基苯酚作为主要产物。将得到的邻甲硅烷基取代的苯酚用(CH 2 O)n / MgCl 2 / Et 3甲酰化。N,然后与二胺缩合以良好的收率得到甲硅烷基取代的Salen型配体。该方案适用于大规模合成带有亚胺基的甲硅烷基取代的salen型配体。
2-Substituted thiazolidinone and oxazolidinone derivatives for the inhibition of phosphatases and the treatment of cancer
申请人:——
公开号:US20040097566A1
公开(公告)日:2004-05-20
The present invention relates to certain substituted heterocycles, including 2-substituted thiazolidinone and 2-substituted oxazolidinone compounds. These compounds are useful in the treatment of diseases related to uncontrolled cellular proliferation, such as cancer or precancerous conditions. The compounds are also useful for modulating lipid and/or carbohydrate metabolism, and treating Type II diabetes, hyperglycemia or obesity, and for treating inflammatory diseases such as arthritis.
Some disclosed embodiments of the invention relate to compounds having the structures indicated below, or a pharmaceutically acceptable salt thereof.
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