<![CDATA[Letters in Organic Chemistry (Volume 21 - Issue 7)]]> https://www.benthamscience.com/journal/48 RSS Feed for Journals | BenthamScience EurekaSelect (+https://www.benthamscience.com) 2024-03-27 <![CDATA[Letters in Organic Chemistry (Volume 21 - Issue 7)]]> https://www.benthamscience.com/journal/48 <![CDATA[Can Glycerol Carbonate be Synthesized Without a Catalyst?]]>https://www.benthamscience.com/article/1372422024-03-27oC in 36 hours, whereas, using microwaves, 92% of glycerol carbonate can be achieved in 30 minutes. Presently, biomass-based heterogeneous materials are used in catalysis due to their importance within the context of sustainability. In line with this, in this work, a series of green catalysts, namely, molecular sieves (MS, 4Å), Hβ- Zeolite, Montmorillonite K-10 clay, activated carbon prepared from the shell of groundnut (Arachis hypogaea), and biochar from sawdust pyrolysis were successfully employed. Glycerol carbonate was thoroughly characterized by 1H and 13C NMR, FT-IR and MS. The method described here is facile and green since the utilization of bioresource (glycerol) for the production of glycerol carbonate is performed under microwave.]]> <![CDATA[Exploring the Supramolecular Features, Computational Studies, and Molecular Docking Studies of a Carbamate Schiff Base]]>https://www.benthamscience.com/article/1369002024-03-27 <![CDATA[Novel Amide Functionalized Trifluoromethyl thieno[2,3-b]pyridine Derivatives: Anti-cancer Activity and Molecular Docking Studies]]>https://www.benthamscience.com/article/1378522024-03-27 <![CDATA[Study on the Reactivity of Mixed Carboxylic Palmitic Anhydrides <i>via</i> the Esterification Reaction Using Heterogeneous Catalyst]]>https://www.benthamscience.com/article/1372532024-03-27 Lipid esters are prepared from mixed fatty anhydrides by esterification. These esters are high-value-added intermediates used in industrial applications. We describe the synthesis and characterization of esters using salicylic acid and mixed anhydrides with zinc oxide as catalysts. To achieve maximum reaction efficiency, we varied the mixed anhydride and studied some parameters in the reaction, such as the molar ratio (anhydride/alcohol) and the amount of catalyst. The esterification reaction was realized with some primary and secondary alcohols in the presence of resin Amberlyst- 15. The best yield of the palmitic ester was obtained in the case of mixed 4-chlorobenzoic palmitic anhydride. We obtained 53% of fatty ester. Moreover, we also studied the reactivity of certain mixed anhydrides for the esterification reaction of salicylic acid in the presence of a Lewis acid as a heterogeneous catalyst.

The anhydrides were prepared in the presence of triethylamine in the organic solvent by a reaction between fatty acid and acid chloride. Mixed aromatic palmitic were more reactive and selective than the aliphatic anhydrides. The palmitic group was the most involved in acylation. Good yields of fatty esters were obtained with total conversion of mixed anhydrides.

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<![CDATA[Catalyst-free Approach to Dihydropyrimidones Using Glycerol/Ethyl Lactate as a Recyclable and Biodegradable Promoting Medium]]>https://www.benthamscience.com/article/1383962024-03-27 <![CDATA[Celecoxib Catalyzed the Coupling Reaction of Epoxide and CO<sub>2</sub>]]>https://www.benthamscience.com/article/1378532024-03-27 <![CDATA[Malic Acid as a Green Catalyst for the N-Boc Protection under Solvent-free Condition]]>https://www.benthamscience.com/article/1378542024-03-27 <![CDATA[Treatment of Reactive Orange 16 Dye-Bearing Wastewater by Electro-Fenton Process with Stainless-Steel Electrodes: Statistical Optimization and Operational Analysis]]>https://www.benthamscience.com/article/1382212024-03-27L16 orthogonal array were used in the experimental procedures. At optimal conditions, the coefficient of determination (R2) values of 0.99 for CC and 0.97 for TD suggest statistical significance and good model agreement. The results of the ANOVA and Prob. > F values supported the model’s successful experimental data fitting. Taguchi method was found as an appropriate methodology for parameter percentage contributions with fewer experimental runs. Moreover, the S/N ratio charts proved to be a successful CC design replacement. The current density and pH were found to be the most important factors for the EF process. A higher biodegradability (BOD5/COD) and minimum iron concentration (0.45 mg/L) in the effluent sludge demonstrated good environmental disposal suitability. In the last, the effect of various inhibitors/scavengers (SO4 −2, PO4 −3, EDTA, etc.) on the EF process performance was also carried out.]]>