Mesoporous heterogeneous santa barbara amorphous (SBA)‐15‐supported cobalt complex, as a novel nanocatalyst containing N–O chelating Schiff‐base ligand was successfully synthesized by the reaction of SBA‐15 and Cobalt(II)‐Schiff‐base complex. The Co(II)‐Schiff base complex also was prepared for the first time, by the reaction of pyridoxal 5′‐phosphate or PLP (biological active form of vitamin B6), 3‐(aminopropyl)‐triethoxysilane in methanol that complexation with CoCl₂. The subsequent grafting of entitled complex to SBA‐15 afforded Co(II)‐PLP‐Schiff base/SBA‐15 mesoporous catalyst. Characterization of the product was carried out with powder X‐ray diffraction, Brunauer–Emmett–Teller nitrogen adsorption–desorption, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, atomic absorption spectroscopy, and inductively coupled plasma, Fourier‐transform infrared spectroscopy. The results revealed the retention of the textural properties and hexagonally uniform structures of SBA‐15 during the grafting procedure. This nanocatalyst was applied successfully for one‐pot synthesis of various benzothiazole heterocycles under green conditions. This catalyst is an active, reusable, and stable nanomaterial with no leaching of metal ions to the reaction medium. It was used for the synthesis of desired benzothiazole heterocycles by the cyclo‐condensation of aryl‐aldehydes with 2‐aminothiophenol with good to excellent yields and under green conditions.

中文翻译：

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新型钴（II）-吡rid醛磷酸盐-席夫碱/ SBA-15的合成，表征及应用作为绿色合成苯并噻唑杂环的纳米催化剂

通过SBA-15和钴（II）-席夫碱复合物的反应成功合成了介孔非均相圣巴巴拉无定形（SBA）-15负载的钴络合物，它是一种新型的含N-O螯合席夫碱配体的纳米催化剂。Co（II）-Schiff碱配合物也是首次制备，通过吡ido醛5'-磷酸或PLP（维生素B6的生物活性形式），3-（氨丙基）-三乙氧基硅烷在甲醇中与CoCl络合反应₂。随后将有标题的复合物接枝到SBA-15上，得到了Co（II）-PLP-Schiff碱/ SBA-15介孔催化剂。用粉末X射线衍射，Brunauer-Emmett-Teller氮吸附-解吸，透射电子显微镜，扫描电子显微镜，热重分析，原子吸收光谱，电感耦合等离子体，傅里叶变换红外光谱对产品进行表征。结果表明，在接枝过程中，SBA-15的质地和六角形均匀结构得以保留。该纳米催化剂已成功用于绿色条件下的一锅法合成各种苯并噻唑杂环。该催化剂是一种活性，可重复使用和稳定的纳米材料，没有金属离子浸出到反应介质中。