A highly efficient and environmentally friendly approach for the synthesis of 1,8-dioxo- octahydroxanthenes has been developed catalysed by a supported cobalt nanoparticle catalyst ([email protected]) in water. The use of this heterogeneous catalytic system offered several advantages including high yields, low catalyst loading, short reaction times and easy workup. Furthermore, the catalyst was efficiently reused for ten consecutive cycles without any significant loss in catalytic activity.

中文翻译：

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使用负载的钴纳米颗粒作为高效且可回收的纳米催化剂，水合合成1,8-二氧-八氢氧杂蒽

已经开发了一种在水中负载型钴纳米颗粒催化剂（[受电子邮件保护]）催化的高效，环保的1,8-二氧代八氢氧杂蒽合成方法。使用这种非均相催化体系具有许多优点，包括高收率，催化剂用量低，反应时间短和后处理容易。此外，该催化剂被有效地重复使用了十个连续循环，而催化活性没有任何明显的损失。