2017年3月30日Choon-Hong Tan教授学术报告

报告主题:Chiral Cationic Ion-Pairing Catalysis

报告人:Choon-Hong Tan教授,新加坡南洋理工大学

主持人:李乐教授

时间:2017年3月30日16:00-18:00

地点:丰盛堂芙兰学术中心A402

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报告摘要:

Phase transfer reactions using chiral cations and inorganic basic salts such as hydroxides and carbonates are but a sub-set of a larger group of reactions known as chiral cation ion-pairing catalysis. Herein, we report three reactions using chiral dicationic bisguanidinium ion pairs as catalysis; they are are each paired with three different organometallic anions – permanganate, tungstate and molybdate. The ion pairs-catalyzed asymmetric oxidation of alkenes and sulfoxidation respectively. In this new mode of cataysis, evidence suggests that rate acceleration is mainly attributed to transition state stabilization through attractive cation-anion interaction rather than enhancing solubility in organic solvents.

 


报告人简介:

 Choon-Hong Tan博士现为新加坡南洋理工大学教授,也是暨南大学客座教授。Tan教授的研究兴趣涉及合成有机化学、生物和药物化学以及放射化学等多个领域。Tan教授是有机小分子催化领域的国际知名专家,目前已经JACSAngewandte ChemieNature Communication等国际知名杂志发表论文100多篇并获得多项专利。

 


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