Abstract

A novel magnetically heterogeneous nanocatalyst has been successfully synthesized via the immobilization of piperazine on tris (hydroxymethyl) aminomethane-coated Fe₃O₄ magnetic nanoparticles. The described catalyst was fully characterized by various techniques such as FT-IR, EDS, DTG/TGA, XRD, TEM, SEM, and VSM analyses. The catalytic efficacy of Fe₃O₄@THAM-piperazine has investigated for one-pot synthesis of tetrahydrobenzo[b]pyran and 1,8-dioxo-octahydro-xanthene derivatives. Notable features of this user-friendly catalytic system include high yields, high catalytic activity, simple operation, non-toxicity, and easy work-up. Also, the new nanocatalyst could be easily recovered and reused for six times without significant loss of activity.

Graphic abstract

中文翻译：

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Fe 3 O 4 @ THAM-哌嗪：一种新型且高度可重复使用的纳米催化剂，用于一锅合成1,8-二氧-八氢-黄嘌呤和苯并吡喃

摘要

通过将哌嗪固定在三（羟甲基）氨基甲烷包覆的Fe ₃ O ₄磁性纳米粒子上，已成功合成了新型的磁性非均相纳米催化剂。所描述的催化剂已通过多种技术进行了全面表征，例如FT-IR，EDS，DTG / TGA，XRD，TEM，SEM和VSM分析。研究了Fe ₃ O ₄ @ THAM-哌嗪对一锅合成四氢苯并[ b]的催化作用。]吡喃和1,8-二氧-八氢-an吨衍生物。该用户友好型催化系统的显着特点包括高收率，高催化活性，操作简单，无毒且易于后处理。而且，新的纳米催化剂可以容易地回收并重复使用六次而不会显着降低活性。

图形摘要