Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, 826004, India.
Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, 826004, India.
Int J Biol Macromol. 2023 Dec 1;252:126497. doi: 10.1016/j.ijbiomac.2023.126497. Epub 2023 Aug 26.
A new biocomposite of chitosan, chitosan-supported di(pyridine-2-yl)methanone-Ni(II) complex, CS-DPM-Ni, is synthesized for the first time. The biocomposite is thoroughly characterized by FTIR, PXRD, XPS, FESEM, EDX, TGA, ICP-OES, and elemental analysis. The synthesized composite is successfully used as a heterogeneous catalyst in the synthesis of a library of xanthone derivatives by the intermolecular catalytical coupling of 2-substituted benzaldehydes and phenols. The catalyst could be retrieved from the reaction mixture by simple filtration and reused for up to four catalytic cycles. All products were isolated in good to high yields (65-90 %) with good turnover numbers (TONs), and fully characterized by H and C{H} NMR spectroscopy. The green chemistry metrics values for the reaction were discerned and found to be close to the ideal values.
首次合成了壳聚糖、壳聚糖负载二（吡啶-2-基）甲酮-镍（II）配合物 CS-DPM-Ni 的新型生物复合材料。通过 FTIR、PXRD、XPS、FESEM、EDX、TGA、ICP-OES 和元素分析对生物复合材料进行了彻底的表征。该复合材料成功地用作异相催化剂，通过 2-取代苯甲醛和苯酚的分子间催化偶联，合成了黄烷酮衍生物库。通过简单过滤，催化剂可从反应混合物中回收，并在多达四个催化循环中重复使用。所有产物均以良好至高产率（65-90%）分离，具有良好的转化率（TON），并通过 H 和 C{H} NMR 光谱进行了充分表征。反应的绿色化学指标值被识别出来，发现接近理想值。
