尽管在药物发现和开发中需要代谢物合成,但用于形成氧化芳族 CO 键的合成方法很少。我们报告了一种用于芳烃后期 CO 键形成的新方法。即使对于高度官能化的底物,该反应也以优异的官能团耐受性进行。所得的甲磺酸芳基酯提供了获取潜在的人类药物代谢物的途径,并可直接用于安装 CF 键以阻断代谢热点。试剂双(甲磺酰基)过氧化物和底物芳烃之间的电荷转移相互作用可能与芳烃相对于其他官能团的化学选择性官能化有关。
尽管在药物发现和开发中需要代谢物合成,但用于形成氧化芳族 CO 键的合成方法很少。我们报告了一种用于芳烃后期 CO 键形成的新方法。即使对于高度官能化的底物,该反应也以优异的官能团耐受性进行。所得的甲磺酸芳基酯提供了获取潜在的人类药物代谢物的途径,并可直接用于安装 CF 键以阻断代谢热点。试剂双(甲磺酰基)过氧化物和底物芳烃之间的电荷转移相互作用可能与芳烃相对于其他官能团的化学选择性官能化有关。
Selective methylene C–H oxidation for the synthesis of alcohols with a broad scope and functional group tolerance is challenging due to the high proclivity for further oxidation of alcohols to ketones. Here, we report the selective synthesis of benzylic alcohols employing bis(methanesulfonyl) peroxide as an oxidant. We attempt to provide a rationale for the selectivity for monooxygenation, which is
[EN] PROCESS FOR PREPARING ALKANESULFONIC ACIDS FROM SULFUR TRIOXIDE AND AN ALKANE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDES ALCANE-SULFONIQUES À PARTIR DE TRIOXYDE DE SOUFRE ET D'UN ALCANE
申请人:GRILLO CHEMIE GMBH
公开号:WO2015071365A1
公开(公告)日:2015-05-21
A process for preparing alkanesulfonic acids from sulfur trioxide and an alkane, wherein sulfur trioxide, the alkane and dialkylsulfonoyi peroxide (DASP) react as components, characterized in that the following steps are performed : a) sulfur trioxide is charged in a high-pressure reactor in a condensed phase; b) a temperature of at least 25 °C is set; c) the gaseous alkane is introduced to the high-pressure reactor until a pressure of at least 10 bar is reached; d) dialkylsulfonoyi peroxide (DASP) is added; and e) after a duration of at least 5 hours, the produced alkanesulfonic acid is withdrawn.
[EN] PROCESS FOR PREPARING BIS(ALKANESULFONYL PEROXIDE)<br/>[FR] PROCÉDÉ DE PRÉPARATION DE BIS(ALCANESULFONYL)PEROXYDE
申请人:GRILLO CHEMIE GMBH
公开号:WO2015071351A1
公开(公告)日:2015-05-21
A process for preparing bis(alkanesulfonyl)peroxide of the formula (I), in which ALK represents an alkyl group, characterized by the following process steps: a)mixing an alkylsulfonic acid chloride in a reaction vessel; b)with an excess of a peroxide-containing compound; c)optionally adding a basic compound if hydrogen peroxide is employed; d)allowing the mixture to react; adding water to terminate the reaction; and e)separating the reaction product obtained, bis(alkanesulfonyl)peroxide.
The Methylsulfonyloxyl Radical, CH
<sub>3</sub>
SO
<sub>3</sub>
作者:Bifeng Zhu、Xiaoqing Zeng、Helmut Beckers、Joseph S. Francisco、Helge Willner
DOI:10.1002/anie.201503776
日期:2015.9.21
AbstractThe methylsulfonyloxyl radical, CH3SO3, one of the key intermediates in the atmospheric oxidation of dimethyl sulfide (DMS), was generated by flash pyrolysis of CH3SO2OOSO2CH3 and subsequently isolated in solid noble‐gas matrices. The radical has been characterized by UV/Vis and IR spectroscopy and its tautomerization to CH2SO3H observed upon irradiation with light of λ≥360 nm.