Abstract

Potassium salts of magnetic graphitic carbon nitride (Fe₃O₄@g-C₃N₄-K) synthesized and proved to be a green and recyclable catalyst for rapid and regioselective ring opening of epoxides with TMSCN, yielding the β-hydroxynitrile ring-opened products under mild reaction conditions. It is manageable to large-scale preparation with simple instruments and gives the desired compounds in short reaction times with good-to-excellent yields (73–95%) under solvent-free conditions. Magnetic separation protocol has used to achieve a simple separation and reuse of catalysts from unpurified reaction mixtures using external magnets without loss of catalytic operation after five cycles.

Graphic abstract

中文翻译：

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TMSCN使用磁性氮化碳的钾盐使环氧化物的绿色和区域选择性开环

摘要

磁性石墨碳氮化碳（Fe ₃ O ₄ @gC ₃ N ₄ -K）的钾盐经合成，被证明是一种绿色且可回收的催化剂，可用于通过TMSCN快速和区域选择性地使环氧化物开环，生成β-羟基腈开环产物在温和的反应条件下。使用简单的仪器即可进行大规模制备，并且在无溶剂条件下以较短的反应时间即可获得所需化合物，并具有良好至优异的收率（73–95％）。磁分离方案已使用外部磁体实现了从未纯化的反应混合物中简单分离和重复使用催化剂，而在五个循环后没有损失催化操作。

图形摘要