An efficient approach for the synthesis of 2,6‐dimethyl‐1,3‐diarylpyrano[4,3‐b]pyrrol‐4(1H)‐one derivatives has been established. The reaction was performed in aqueous media using readily available and inexpensive 6‐methyl‐4‐(phenylamino)‐2H‐pyran‐2‐one and nitroolefin as substrates. The present methodology shows many attractive advantages, such as using water as green reaction media, inexpensive and environmentally friendly acetic acid as catalyst, easy work‐up procedure, and good to excellent yields.
The mesoporous silica SAB-15 material and a series of nanocomposite bimetal oxides-SBA-15 materials are synthesized. The oxidation of various benzyl alcohols to aromatic aldehydes has been studied using nano-composite bimetal oxides-SBA-15 materials as catalysts in air. The results indicate that the CrMnOx-SBA-15 material can promote the oxidation of benzyl alcohols to aromatic aldehydes with excellent yields smoothly.The microstructure and morphology of SBA-15 and CrMnOx-SBA-15 materials are characterized by SEM, TEM, XRD and nitrogen adsorption/desorption isotherms, respectively. In addition, the UHRTEM images, EDS image mapping, and the Xray photoelectron spectroscopy (XPS) of CrMnOx-SBA-15 material also are characterized, which indicate the structure of the catalyst is advantageous to improve its catalytic activity.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.