In this work, a vanillin complex is immobilized onto MCM‐41 and characterized by FT‐IR, X‐ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, thermogravimetric analysis, and BET techniques. This supported Schiff base complex was found to be an efficient and recoverable catalyst for the chemoselective oxidation of sulfides into sulfoxides and thiols into their corresponding disulfides (using hydrogen peroxide as a green oxidant) and also a suitable catalyst for the preparation of 2,3‐dihydroquinazolin‐4(1H )‐one derivatives in water at 90°C. Using this protocol, we show that a variety of disulfides, sulfoxides, and 2,3‐dihydroquinazolin‐4(1H )‐one derivatives can be synthesized in green conditions. The catalyst can be recovered and recycled for further reactions without appreciable loss of catalytic performance.

中文翻译：

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固定在MCM-41上的VO-香兰素复合物的合成，表征及其在亚砜氧化反应中的催化应用，以及绿色介质中2,3-二氢喹唑啉-4（1H）-one和二硫化物的合成

在这项工作中，将香兰素复合物固定在MCM-41上，并通过FT-IR，X射线衍射，扫描电子显微镜，能量色散光谱，热重分析和BET技术进行表征。发现这种担载的席夫碱配合物是一种有效且可回收的催化剂，可用于将硫化物化学选择性氧化为亚砜和硫醇使其相应的二硫化物（使用过氧化氢作为绿色氧化剂），也是制备2,3-的合适催化剂。90°C水中的二氢喹唑啉-4（1 H）-1衍生物。使用此协议，我们显示了各种二硫化物，亚砜和2,3-二氢喹唑啉-4（1 H）-一种衍生物可以在绿色条件下合成。催化剂可以回收并循环用于进一步的反应，而不会明显降低催化性能。