Review
Chemistry, Inorganic & Nuclear
Umit B. Demirci
Summary: Ammonia borane (AB) was discovered in the 1950s, but its potential as a chemical hydrogen storage material was only recognized in the 2000s. It has complex decomposition mechanisms, with recent studies providing insights into the process and potential strategies for destabilization to release pure hydrogen. This understanding is crucial for technological progress in utilizing AB for hydrogen storage.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Abdel Majid A. Adam, Hosam A. Saad, Amnah M. Alsuhaibani, Moamen S. Refat, Mohamed S. Hegab
Summary: Research on the charge-transfer interactions between the antibiotic azithromycin and three pi-acceptors may provide insights for improving treatment protocols for COVID-19. The synthesized CT products exhibited different morphologies from the free reactants.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Sabina Yashmin, Rashid Ali, Santa Mondal, Abu Taleb Khan
Summary: An unprecedented metal-free and catalyst-free synthesis method for synthesizing benzo[c]chromeno[4,3,2-gh]phenanthridine derivatives is reported for the first time. The remote cyclization and aromatization reactions are achieved through a series of reaction steps. A DMSO-assisted synthesis method is also disclosed for the first time.
CHEMICAL COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Chunyi Li, Guowei Wang
Summary: Researchers are working on improving the catalysts and reactors for light alkane dehydrogenation to mono-olefins to address the high cost of Pt catalysts and potential environmental issues with CrOx, exploring new non-noble metal and environment-friendly catalysts. Additionally, reducing operation pressure can decrease the energy consumption of the entire process.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Inorganic & Nuclear
Zhiyun Hu, Xinzheng Yang
Summary: The study using density functional theory revealed unexpected binuclear di-tert-butyl peroxide (DTBP) homolysis with spin-crossover and a radical alpha-C-H bond activation mechanism in Cu-catalyzed desaturation of delta-valerolactone into alpha,beta-unsaturated counterparts. The rate-determining step was found to be the homolysis of the O-O bond in DTBP, while the alpha- and beta-H transfer steps had lower barriers than the O-O cleavage process. The substitution of CyPPh2 for pyridine in Cu complexes resulted in higher barriers for O-O bond cleavage and C-H bond activations with the formation of more stable binuclear Cu complexes.
DALTON TRANSACTIONS
(2021)
Article
Plant Sciences
Meijia Zheng, Yang Xiao, Qin Li, Yixin Lai, Bingbing Dai, Mi Zhang, Xin Kang, Qingyi Tong, Jianping Wang, Chunmei Chen, Hucheng Zhu, Yonghui Zhang
Summary: Nine new ergosteroids and seven known ones were isolated from Talaromyces adpressus. The structures and absolute configurations were determined, and some of the compounds showed cytotoxic and immunosuppressive activities.
JOURNAL OF NATURAL PRODUCTS
(2023)
Article
Biophysics
Vidhi Shah, Bhavesh Bharatiya, Santosh Gawali, Puthusserickal A. Hassan, Atindra D. Shukla, Ankit Khandelwal, Himadri Bhatt, Vihas Vasu, Dinesh O. Shah
Summary: In an attempt to address the limitations of the currently available marketed formulation of exemestane, a study was conducted using a lamellar liquid crystal based formulation for topical application. Results showed that the formulation exhibited gel-like properties at low shear rate, transitioning to a flowing liquid at higher shear rate. This alternative route of drug delivery may offer improved bioavailability of exemestane due to enhanced solubility, permeability, and absorption.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Chemistry, Physical
Sadia Afrin, Praveen Bollini
Summary: Quantitative analyses of four sets of aerobic/anaerobic ethanol conversion transients reveal the evolution of a high-surface-area cerium oxide surface that catalyzes nonoxidative ethanol dehydrogenation upon complete surface reduction. Aerobic-anaerobic switches lead to new steady state dehydrogenation rates, with termination of oxygen imbalances and induction periods in anaerobic experiments pointing to ethanol dehydrogenation turnovers originating from surface reduction. High vacancy densities obtained from analysis of oxygen imbalances indicate the catalytic origin of acetaldehyde during aerobic-anaerobic switches and anaerobic induction periods.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Yali Meng, Qinghao Sun, Tianjun Zhang, Jichao Zhang, Zhuoya Dong, Yanhang Ma, Zhangxiong Wu, Huifang Wang, Xiaoguang Bao, Qiming Sun, Jihong Yu
Summary: A step-by-step reduction strategy was developed to synthesize small-sized bimetallic species supported on various metal oxide supports. The introduction of Co species significantly enhanced the catalytic activity of noble metals (e.g., Pt, Rh, Ru, and Pd) in ammonia borane hydrolysis reactions. The optimized Pt0.1%Co3%/TiO2 catalyst showed a high turnover frequency (TOF) value and outperformed monometallic Pt/TiO2 and commercial Pt/C catalysts in terms of H2 generation rate and stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Tamanna Khandelia, Subhendu Ghosh, Pritishree Panigrahi, Raju Mandal, Deepjyoti Boruah, Bhisma K. Patel
Summary: This study presents a visible light-driven di-functionalization of maleimide with disulfide and in situ-generated singlet oxygen, allowing for the selective 1,2-thiohydroxylation under additive-free conditions.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Tamanna Khandelia, Subhendu Ghosh, Pritishree Panigrahi, Raju Mandal, Deepjyoti Boruah, Bhisma K. Patel
Summary: A visible light-driven di-functionalization method was developed for the selective 1,2-thiohydroxylation of maleimide under additive-free conditions. This reaction employed disulfide as a dual role of photosensitizer and the coupling reagent, and the hydroxyl functionality originated from in situ-generated singlet oxygen followed by hydrogen atom transfer (HAT) from moisture.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jia Ding, Shuaishuai Luo, Yuanli Xu, Qing An, Yi Yang, Zhiwei Zuo
Summary: A synergistic photocatalytic system using a bisphosphonium catalyst and a cobalt catalyst has been developed for the selective oxidation of benzylic alcohols under oxidant-free and environmentally benign conditions. The system showed high efficiencies for various alcohol substrates and achieved exclusive selectivity for aldehyde products. Furthermore, it proved to be efficient when performed under continuous-flow conditions, using a simple and easily assembled continuous-flow setup.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yibin Xue, Guangbin Dong
Summary: This paper describes the first total synthesis of sesquiterpene penicibilaenes A and B through a C-C/C-H approach. The unique tricyclo[6.3.1.0(1,5)]dodecane skeleton and all-carbon quaternary center were constructed in the C-C stage using Rh-catalyzed cut-and-sew transformation. A desaturation relay-based strategy was employed in the C-H stage to introduce the 1,3,5-triad stereocenters to the core. The total synthesis of penicibilaenes A and B was completed in 13 and 14 steps, respectively, in the longest linear sequence.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Review
Chemistry, Multidisciplinary
Scott R. Docherty, Lukas Rochlitz, Pierre-Adrien Payard, Christophe Coperet
Summary: The review discusses the use of model dehydrogenation catalysts for light alkanes prepared via surface organometallic chemistry, with a specific focus on molecular strategies for deconvoluting complex heterogeneous materials. Challenges associated with proposed reactions and overarching themes observed from systematic studies using model SOMC catalysts are highlighted.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Physical
Jian Dou, Joey Funderburg, Kunran Yang, Junchen Liu, Dennis Chacko, Kui Zhang, Adam P. Harvey, Vasudev P. Haribal, S. James. Zhou, Fanxing Li
Summary: CO2-assisted oxidative dehydrogenation of propane (CO2-ODH) is a promising method for propylene production and CO2 utilization. This study focuses on designing CexZr1-xO(2)-mixed oxide-supported CrOx catalysts for CO2-ODH with enhanced selectivity and stability. The addition of Ce to the ZrO2 support greatly improves catalyst stability by enhancing coke resistance.
Article
Chemistry, Organic
Fuying Zhu, Yamei Lin
Summary: In this study, a low-metal iron-supported catalyst (Fe20/NC-Mg) was reported for the efficient synthesis of quinoxaline compounds, using water as a solvent and without additional bases. The synergistic effect of FeNx site and Mg (OH)2 nanorods in the catalyst played a key role in achieving high yields (82-91%) in 16 examples. The gram-level synthesis and reusability of the catalysts after four cycles demonstrated its industrial application potential.
Article
Chemistry, Organic
Mikhail Kozlov, Alexey Tyurin, Andrey Dmitrenok, Vyacheslav Rusak, Aleksander Fedorov, Igor Zavarzin, Yulia Volkova
Summary: This study presents a novel and practical synthesis method for phosphorus-substituted 1,3,4-thiadiazolines using phosphorylthioformic acid hydrazides and ketones. The protocol demonstrates operational simplicity, availability of reagents, and tolerance towards different functional groups.
Article
Chemistry, Organic
Jisna Jose, Thomas Mathew
Summary: 2-Cyclopentenone and its derivatives are highly esteemed synthetic intermediates with exceptional utility in organic synthesis. They are favored structural motifs in numerous pharmaceutical drugs and natural products, highlighting their significance. The review discusses the various methods used to synthesize cyclopentenones from 2016 to 2023.
