摘要/Abstract
砜是天然产物和活性分子中常见的结构, 也是合成反应的重要中间体. 利用5-氯-8-氨基喹啉(AQ')作为双齿导向基团, 以各种芳基亚磺酸钠为磺酰化试剂, 通过铜催化实现了邻位C(sp 2)—H直接磺酰化. 该反应具有较高的官能团兼容性和广泛的底物范围, 适用于具有双取代基和稠环的底物. 另外, AQ'作为双齿导向基团易于脱去, 为合成砜类化合物提供了一种新型的方法. 更重要的是该反应放大至克级规模依然具有良好收率.
关键词: 铜催化, 碳氢键官能团化, 磺酰化
Sulfone is a common structure in natural products and active molecules, and also an important intermediate in organic synthesis. Sulfonylation is one of the most basic and important reactions in organic synthesis. The direct sulfonylation of C(sp 2)—H bond has been successfully realized by copper catalysis using 5-chloro-8-aminoquinoline (AQ') as a bidentate guiding group and various substituted sodium arylsulfites as sulfonylation reagent. This reaction has high functional group tolerance and a wide scope of substrates, including substrates with double substituents or fused rings. AQ' bidentate guiding group can be removed easily, which provides a new method for the synthesis of sulfone compounds. The reaction could be scaled up to the gram scale with a good yield.
Key words: copper catalysis, carbon hydrogen functionalization, sulfonylation
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