高级检索

    氟苯合成研究进展

    Recent advances in the synthesis of fluorobenzene

    • 摘要: 氟苯是一种重要的含氟有机中间体,被广泛用于三氟哌啶醇、三氟哌啶苯、氟虫脲、氟硅唑等农药/医药以及液晶等高分子材料及其单体的合成。近年来,随着农药、医药、电子信息等产业的快速发展,氟苯需求量也随之呈现高速增长趋势。文中总结了迄今已报道的氟苯合成方法,按反应类型将其分为Balz-Schieman反应、亲核氟化、亲电氟化、电化学氟化、氧氟化反应等六类,并系统概述了不同合成方法的研究进展;同时指出目前工业上合成氟苯仍以Balz-Schieman法为主,但该工艺本质安全性差、三废多的问题尚未得到有效解决;而其他新兴方法如亲核氟化法、亲电氟化法等存在活性低、氟化试剂成本高、选择性差等问题。随后,对影响上述氟苯合成反应效率的关键催化剂,从结构、组成、制备方法等方面进行了总结与评述,发现现有气相氟化催化剂体系难以满足氟苯合成反应需求,液相氟化、相转移催化剂因成本高、回收利用难,也需进一步优化。最后,指出未来氟苯合成技术的发展需重点围绕微反应器技术、新型氟化试剂、高效氟化催化剂开展研究工作。

       

      Abstract: Fluorobenzene is an important fluorine-containing organic intermediate, widely used in the synthesis of pesticides/pharmaceuticals such as trifluoperidol, trifluoperazine, flufenoxuron, and flusilazole, as well as in the production of liquid crystals and the monomers for high-performance polymer materials. In recent years, with the rapid development of industries such as agrochemicals, pharmaceuticals, and electronic information, the demand for fluorobenzene has shown a significant upward trend. This review summarizes the synthetic methods of fluorobenzene reported to date, categorizing them into six types of reactions: Balz-Schiemann reaction, nucleophilic fluorination, electrophilic fluorination, electrochemical fluorination, and oxyfluorination. The research progress of each synthetic approach is systematically reviewed; the industrial synthesis of fluorobenzene is still dominated by the Balz-Schieman method, but the poor intrinsic safety of the process and the problem of many three wastes have not yet been effectively solved; and other emerging methods, such as nucleophilic fluorination and electrophilic fluorination, suffer from the problems of low activity, high cost of fluorination reagents and poor selectivity. Furthermore, we also analyze the key catalysts that influence the efficiency of these synthesis reactions, focusing on their structures, compositions, and preparation methods. The existing gas-phase fluorination catalyst system can hardly meet the demand of fluorobenzene synthesis reaction, and the liquid-phase fluorination and phase-transfer catalysts need to be further optimised due to their high cost and difficulty in recycling. Finally, the future development of fluorobenzene synthesis should focus on microreactor technology, new fluorination reagents and efficient fluorination catalysts.

       

    /

    返回文章
    返回