回顾硫酸氧化物在合成重要杂环化合物中的作用:认识、挑战和未来展望

Sandeep S. Kahandal , Anand S. Burange , Thomson A. Fernandes
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引用次数: 0

摘要

发展可持续的催化过程是未来的要求,以取代涉及危险、非绿色、非良性试剂/溶剂和成本效率低下的传统方案。金属氧化物和混合金属氧化物由于其氧化还原特性使其成为传统均相催化剂的潜在替代品。酸化过程可以进一步增强酸性,形成硫酸氧化物,代表了一类新的固体酸催化剂。本文综述了硫酸固体酸催化剂的研究进展,重点介绍了硫酸固体酸催化剂的认识、方法、应用及其在合成具有重要药用价值的杂环化合物中的作用。本文还讨论了影响催化剂酸度的因素、反应介质中浸出的可能性、磺化阻止浸出的方法、其他挑战和未来展望。
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Revisiting the role of sulfated oxides for the synthesis of pharmaceutically important heterocycles: Understanding, challenges, and future prospects

The development of sustainable catalytic processes is the requirement of the future to replace traditional protocols involving hazardous, non-green, non-benign reagents/solvents, and cost ineffectiveness. Metal and mixed metal oxides due to their redox properties make them potential substitutes for conventional homogeneous catalysts. The acidity can be enhanced further by the sulfation process to form sulfated oxides representing a new class of solid acid catalysts. This review is the revisiting of sulfated solid acid catalysts, with major emphasis on understanding, methods, applications, and their role in the syntheses of heterocycles of pharmaceutical importance. The present review also discusses factors affecting the acidity of the catalysts, possibilities of leaching in reaction media, methods of sulfation to arrest leaching, other challenges, and future prospects.

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