Article
Chemistry, Inorganic & Nuclear
Nidhi Kumari, Anup Mahata, Biswarup Chakraborty
Summary: The global consumption of triphenylphosphine (Ph3P) for organic synthesis and the production of triphenylphosphine oxide (Ph3PO) waste is high. Recycling Ph3PO and using it as a reaction mediator has gained attention. In this study, a phosphamide analogue to Ph3PO has been synthesized and used as a heterogeneous mediator for the Appel reaction with successful catalytic conversion and recovery. This approach showcases the potential use of phosphamides in phosphorus-mediated reactions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Ting Xu, Qingru Zeng, Xin Liu, Shensheng Xiao, Xiaoming Jiang, Yuepeng Lu, Zhiyong Gong, Yonggui Gao, Min Fang
Summary: There is an increasing number of studies on the detection method of 3-chloro-1,2-propanediol fatty acid esters (3-MCPD esters), comparing different methods for determining 3-MCPD esters. Indirect methods have an advantage over direct methods but existing indirect methods may yield unreliable results or require long hours of alkaline methanolysis. In this study, a reliable and rapid indirect method for determining 3-MCPD esters was developed by enzymolysis to 3-MCPD through enzymatic hydrolysis, with optimized conditions. The method is simple, sensitive, and suitable for detecting 3-MCPD esters in general oils.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Da Sol Chung, Steve H. Park, Sang-gi Lee, Hyunwoo Kim
Summary: An electrochemically driven strategy has been developed for the stereoselective synthesis of protected syn-1,2-diols from vinylarenes using N,N-dimethylformamide (DMF). This approach eliminates the need for transition metal catalysts or external oxidizing agents, providing a simple and efficient route to a variety of protected syn-1,2-diols in a single step. The reaction proceeds through electrooxidation of olefin, followed by a nucleophilic attack of DMF, ultimately resulting in a predominantly syn-diastereoselective product.
Article
Chemistry, Multidisciplinary
Charles D. Irving, Jack T. Floreancig, Makafui Gasonoo, Alexandra S. Kelley, Sebastien Laulhe
Summary: This deoxyamination methodology uses phosphonium intermediates generated in situ from N-haloimides and triphenylphosphine to mediate the reaction, allowing for the synthesis of phthalimide and amine derivatives in moderate to good yields at room temperature. NMR experiments have provided insight into the reactive intermediates involved and the mechanism of this deoxyamination reaction.
Article
Chemistry, Applied
Jorge Antonio Custodio-Mendoza, Andrea Ramos, Rosa Antonia Lorenzo, Antonia M. Carro
Summary: A novel, fast, and cost-effective indirect enzymatic method was developed to accurately assess the total 3-MCPD content in canned food. The method achieved outstanding analytical results and demonstrated its reliability through specific derivatization and analysis techniques.
Article
Biochemistry & Molecular Biology
Masoud Mohammadi Vala, Mohammad Bayat, Yadollah Bayat
Summary: This method offers a simple and efficient approach for the synthesis of dihydro-8H-acenaphtho[1',2':4,5]pyrrolo[1,2-a]imidazole-diol derivatives through a one-pot, four-component reaction. The reactions are conducted in ethanol at reflux without the need for a catalyst, resulting in good to high yields with experimental simplicity and easy purification.
MOLECULAR DIVERSITY
(2021)
Article
Biochemistry & Molecular Biology
Kenta Arai, Yuumi Sato, Ikumi Nakajima, Manami Saito, Moeka Sasaki, Akiko Kanamori, Michio Iwaoka
Summary: Amphiphilic derivatives of (+/-)-trans-1,2-diselenane-4,5-diol were employed as GPx-like catalysts for the reduction of H2O2 and lipid peroxidation. The compounds with hydrophilic groups showed high antioxidative activities for H2O2 reduction, while lipophilic compounds with long alkyl chains or aromatic substituents were more effective against lipid peroxidation. These compounds exhibited low cytotoxicity and promising anti-lipid peroxidative activities, indicating their potential as selenium-based antioxidative drugs.
BIOORGANIC & MEDICINAL CHEMISTRY
(2021)
Article
Food Science & Technology
Guanyi Peng, Jiapan Gan, Ruihong Dong, Yi Chen, Jianhua Xie, Ziyan Huang, Yue Gu, Danfei Huang, Qiang Yu
Summary: This study focused on releasing insoluble bound phenolic compounds from grapefruit peel insoluble dietary fiber through microwave extraction, enzymatic hydrolysis, and combined microwave and enzymatic treatment. The combined treatment showed the highest yield and improved antioxidant capacities as well as inhibition of alpha-glucosidase.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Livia Salvati Manni, Michael Duss, Salvatore Assenza, Ben J. Boyd, Ehud M. Landau, Wye-Khay Fong
Summary: This study systematically tuned the molecular structure of lipids to examine their effects on self-assembly and digestion rate. The results demonstrated that small changes in lipid molecular structure, as well as the internal nanostructure of colloidal particles, greatly influence the phase behavior and kinetics of hydrolysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yiyin Liu, Liangyan Zhu, Xuemei Li, Yunfeng Cui, Atefeh Roosta, Jinhui Feng, Xi Chen, Peiyuan Yao, Qiaqing Wu, Dunming Zhu
Summary: In this study, a redox-neutral photocatalysis/enzymatic catalysis system was developed for the asymmetric synthesis of chiral 1,2-amino alcohols via decarboxylative radical C-C coupling. This strategy not only enables the efficient synthesis of a series of chiral amino alcohols in a green and sustainable manner but also has potential for the synthesis of bioactive molecules through novel C-C radical coupling transformations.
Article
Materials Science, Paper & Wood
Nissa Nurfajrin Solihat, Rika Raniya, Triyani Fajriutami, Apri Heri Iswanto, Widya Fatriasari, Ahmad Fudholi
Summary: This study compared the impact of different variables on enzymatic hydrolysis of sweet sorghum bagasse (SSB) kraft pulp and found that amphiphilic lignin derivatives (A-LD) significantly improved the enzymatic hydrolysis performance.
Article
Chemistry, Multidisciplinary
Naoto Chatani, Satoru Fujii, Yoichi Kido, Yasuhide Nakayama, Yasuteru Kajikawa, Hideo Tokuhisa, Yoshiya Fukumoto, Shinji Murai
Summary: The study reports a Co-2(CO)(8)-catalyzed reaction of acetals with hydrosilanes and CO, leading to the production of vicinal diols under mild reaction conditions. The effects of different hydrosilanes, acetals, solvents, and reaction temperatures on the yield of siloxymethylation products were examined. Site-selective siloxymethylation can be achieved with cyclic acetals, depending on the nature of the oxygen substituent attached adjacent to the oxygen atom in the ring.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Chemistry, Inorganic & Nuclear
Malgorzata Kwiatkowska, Piotr Kielbasinski
Summary: The enzyme-promoted hydrolysis of racemic ester derivatives of PTA 11 and its P-sulfide 12 resulted in unreacted esters and corresponding acids, with moderate yields depending on the solvent and enzyme used. However, the products obtained were racemic mixtures in all cases.
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
(2022)
