5398-77-6Relevant articles and documents
Preparation method of p-methylsulfonyl benzaldehyde
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Paragraph 0014; 0027-0028; 0032-0034; 0038-0040; 0044..., (2021/07/24)
The invention relates to a preparation method of p-methylsulfonyl benzaldehyde, and solves the technical problems that the existing preparation method is unreasonable, high in raw material toxicity, complex in operation, high in cost, high in three-waste yield, low in yield and unsuitable for industrial product. The preparation method of p-methylsulfonyl benzaldehyde takes p-nitroformaldehyde as a raw material and sodium sulfide as a reducing agent, and the preparation method comprises the following steps: carrying out a reduction reaction under an alkaline condition to generate p-aminobenzaldehyde, dropwise adding sodium methyl mercaptide into the p-aminobenzaldehyde in the presence of hydrochloric acid and sodium nitrite, carrying out a diazo reaction and a substitution reaction to generate p-methylthiobenzaldehyde, and oxidizing the p-methylthiobenzaldehyde by using hydrogen peroxide under an acidic condition to obtain the p-methylsulfonyl benzaldehyde. The method can be widely applied to the technical field of veterinary drug and medicine raw material medicine synthesis.
Flow Electrosynthesis of Sulfoxides, Sulfones, and Sulfoximines without Supporting Electrolytes
Amri, Nasser,Wirth, Thomas
, p. 15961 - 15972 (2021/07/20)
An efficient electrochemical flow process for the selective oxidation of sulfides to sulfoxides and sulfones and of sulfoxides toN-cyanosulfoximines has been developed. In total, 69 examples of sulfoxides, sulfones, andN-cyanosulfoximines have been synthesized in good to excellent yields and with high current efficiencies. The synthesis was assisted and facilitated through a supporting electrolyte-free, fully automated electrochemical protocol that highlights the advantages of flow electrolysis.
Synthesis of new Zn (II) complexes for photo decomposition of organic dye pollutants, industrial wastewater and photo-oxidation of methyl arenes under visible-light
Ahemed, Jakeer,Bhongiri, Yadagiri,Chetti, Prabhakar,Gade, Ramesh,Kore, Ranjith,Pasha, Jakeer,Pola, Someshwar,Rao D, Venkateshwar
, (2021/07/28)
Synthesis of new Schiff's base Zn-complexes for photo-oxidation of methyl arenes and xylenes are reported under visible light irradiation conditions. All the synthesized new ligands and Zn-complexes are thoroughly characterized with various spectral analyses and confirmed as 1:1 ratio of Zn and ligand with distorted octahedral structure. The bandgap energies of the ligands are higher than its Zn-complexes. These synthesized new Zn(II) complexes are used for the photo-fragmentation of organic dye pollutants, photodegradation of food industrial wastewater and oxidation of methyl arenes which are converted into its respective aldehydes with moderate yields under visible light irradiation. The photooxidation reaction dependency on the intensity of the visible light was also studied. With the increase in the dosage of photocatalyst, the methyl groups are oxidized to get aldehydes and mono acid products, which are also identified from LC-MS data. Finally, [Zn(PPMHT)Cl] is with better efficiency than [Zn(PTHMT)Cl] and [Zn(MIMHPT)Cl] for oxidation of methyl arenes is reported under visible-light-driven conditions.