Article
Chemistry, Organic
Pallabita Basu, Nishikant Satam, Soumyaranjan Pati, Alati Suresh, Irishi N. N. Namboothiri
Summary: The reactivity of Hauser-Kraus (H-K) donor, 3-sulfonylphthalide, with various activated imines under basic conditions is demonstrated. Depending upon the stoichiometry of the base, the reaction of 3-sulfonylphthalide with Boc-protected aldimine provides access to 1,2-imine adducts and alkylidenephthalides. The alkylidenephthalides can be transformed to ketophthalides, and Boc-protected isatinimines can undergo efficient H-K annulation to provide spiro-isoquinolinone-oxindoles.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Takaaki Kamishima, Yoshitaka Koseki, Hirotaka Nakatsuji, Sanjay Kumar, Keita Tanita, Hitoshi Kasai
Summary: This study presents a synthetic method to produce E-selective or multi-substituted enones under reducing conditions through an Ir-catalyzed cascade reaction, resulting in the desired product with high diastereoselectivity. The results also suggest a hypothesis of the reaction mechanism.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Li Jing, Zhong-Jun Li, Er-Qing Li
Summary: We have developed a new 1,3-bis-electrophilic motif and applied it in palladium-catalyzed (3 + 2) annulations. This method offers a straightforward approach to constructing functionalized pyrrolidines with good yields. Importantly, the configuration (Z/E) of the 1,3-bis-electrophilic motif does not affect the yield and chemoselectivity of the reaction. Furthermore, preliminary asymmetric investigations using Pd(0)/thiourea synergistic catalysis resulted in moderate enantioselectivity.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Nitish Deshpande, Jee-Yee Chen, Takeshi Kobayashi, Eun Hyun Cho, Hannah Pineault, Li -Chiang Lin, Nicholas A. Brunelli
Summary: This study investigates the impact of micropores on the catalytic activity of aminosilica materials. By comparing materials with micropores and materials with negligible micropore volume, it is found that the materials with negligible micropore volume exhibit higher catalytic activity in a range of reactions.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Xiaofeng Yuan, Jinyuan Wang, Zijuan Wan, Qiang Zhang, Jun Luo
Summary: The novel magnetic nanoparticle-supported bifunctional catalyst NH-Pd(0)@MNP was successfully prepared and evaluated in a one-pot tandem reaction, producing a series of biaryl derivatives under phosphine-free conditions. The catalyst can be easily separated using an external magnetic field and reused multiple times without significant loss of catalytic activity.
Article
Chemistry, Physical
Tao Wang, Jie Li, Hanwen Yan, Guoliang Zhang, Shifeng Li
Summary: In this study, a series of secondary amines/acids were explored as catalysts for the synthesis of methacrolein (MAL) from formaldehyde and propionaldehyde. The structure of the amines and acids directly affected the yield of MAL. The catalytic performance of the system was systematically studied and optimized.
Article
Biochemistry & Molecular Biology
Akinobu Naka, Hisayoshi Kobayashi
Summary: Rhodium-catalyzed reactions of 2-ethynyl-3-pentamethyldisilanylpyridine derivatives (1 and 2) yielded pyridine-fused siloles (3) and (4) through intramolecular trans-bis-silylation cyclization at 110 degrees C. The reaction of 2-bromo-3-(1,1,2,2,2-pentamethyldisilanyl)pyridine with 3-phenyl-1-propyne in the presence of PdCl2(PPh3)(2)-CuI catalysts resulted in the formation of 1:2 bis-silylation adduct 6. DFT calculations were also performed to understand the reaction mechanism for the production of compound 3 from compound 1.
Article
Chemistry, Inorganic & Nuclear
Deepika Sahil, Ramalingam Thirumoorthi, Chandrakanta Dash
Summary: In this study, a copper(I)-bis(imino)pyridine-triphenylphosphine complex was successfully synthesized and characterized using various analysis methods. The complex exhibited a distorted tetrahedral geometry and was proven to be an effective catalyst for a one-pot multicomponent Click reaction in methanol, resulting in the synthesis of several 1,4-disubstituted 1,2,3-triazoles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Rajata Kumar Sahoo, Nabin Sarkar, Sharanappa Nembenna
Summary: A new zinc hydride catalyzed partial reduction of heteroallenes via hydroboration, selectively obtaining N-boryl formamide from various isocyanates with different functional groups, indicating potential for chemoselective reduction reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Microbiology
Rafael Bianchini Fulindi, Juliana Domingues Rodrigues, Thulio Wliandon Lemos Barbosa, Ariana Goncalves D. Garcia, Felipe de Almeida La Porta, Sebastiao Pratavieira, Leila Aparecida Chiavacci, Joao Pessoa Araujo Junior, Paulo Inacio da Costa, Luis R. R. Martinez
Summary: In this study, the bactericidal and antibiofilm activity of zinc oxide (ZnO) and zinc sulfide (ZnS) nanoparticles against medically important bacteria was analyzed for the first time. The results showed that ZnS and ZnO had similar efficacy in killing bacteria and reducing biofilm formation.
MICROBIOLOGY SPECTRUM
(2023)
Article
Chemistry, Organic
Yuanfei Zhang, Xinghua Li, Jintong Bai, Zhaoyu Huang, Minhai Yin, Jiarong Sheng, Ying Song
Summary: The Rh(III)-catalyzed synthesis method has been achieved for preparing isoquinolinones containing a C3 quaternary center, which is applicable to late-stage diversification of N-methoxyamides derived from steroids and adapalene. This approach serves as a key step for conveniently synthesizing US28 inverse agonist analogs.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Maruthupandi Mannarsamy, Muneshwar Nandeshwar, Gopendra Muduli, Ganesan Prabusankar
Summary: In this study, the synthesis of a novel cyclic zinc(II) complex and its application as a catalyst for condensation reactions and compound synthesis were reported. The complex showed excellent efficiency in catalyzing reactions and synthesizing compounds under mild reaction conditions.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Organic
Changalaraya Dasaradhan, Fazlur-Rahman Nawaz Khan
Summary: An efficient catalytic system for the synthesis of 3-alkenyl isochromen-1-ones has been developed. The activation of 3-chloroisochromen-1-ones by alkyl phosphonium salt is crucial for the regio-selective Heck coupling reactions. The technique has also been extended to other analogs.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Article
Multidisciplinary Sciences
Radek Coufal, Jiri Vohlidal
Summary: The formation of bis-azomethines from hydrazine and heterocyclic aromatic carbaldehydes using water, methanol, and acetic acid as catalysts was studied through density functional theory and experimental results. The presence of stable hemiaminal intermediates was confirmed, and multiple possible reaction sequences and alternative mechanisms were proposed.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Zhigang Zeng, Ying Chen, Xiaoming Zhu, Lei Yu
Summary: Polyanilines (PANIs) are easily prepared from anilines via oxidative polymerization reactions and widely used as supports for nano metal catalysts due to their coordination with metals. Compared to inorganic supports, the nano metals on PANIs are firmly anchored, preventing loss during reactions. Additionally, the chemical features of PANIs can be adjusted, providing tunable catalytic activities. This review aims to summarize recent advances and provide a perspective on PANIs-supported nano metal catalysts.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Organic
Eethamukkala Ubba, Fazlur-Rahman Nawaz Khan
Summary: In the presence of the heterogeneous catalyst M-KSF, 2-chloro-3-formyl quinolines were efficiently converted into regioselective 3-(quinolin-3-yl)pentane-1,5-diones in an aqueous medium.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Article
Chemistry, Organic
Changalaraya Dasaradhan, Fazlur-Rahman Nawaz Khan
Summary: An efficient catalytic system for the synthesis of 3-alkenyl isochromen-1-ones has been developed. The activation of 3-chloroisochromen-1-ones by alkyl phosphonium salt is crucial for the regio-selective Heck coupling reactions. The technique has also been extended to other analogs.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Article
Chemistry, Organic
Ramesh Dalavai, Kannayiram Gomathi, K. Naresh, Fazlur-Rahman Nawaz Khan
Summary: A one-pot synthesis of quinolinyl amine nitriles was achieved using a Zn(CN)(2)/trifluoroethanol system, which is eco-friendly and ambient. The synthesized compounds exhibited moderate-to-good activity in antidiabetic, anti-inflammatory, antioxidant, and molecular docking studies.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Review
Materials Science, Multidisciplinary
Tathagata Kar, Srinivas Godavarthi, Shaik Khadheer Pasha, Kalim Deshmukh, Lorenzo Martinez-Gomez, Mohan Kumar Kesarla
Summary: This review examines the potential of layered materials in supercapacitors, discussing their properties and stability in various electrolytes, as well as the impact of heterojunctions/composites on performance. It also explains the dependence of capacitive behavior on electrode morphology, crystal structure, and electrolyte type. The future perspective on the design and commercial applications of these materials is also presented.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
M. Bala Chennaiah, K. Dilip Kumar, B. Sudheer Kumar, Srinivasa Rao Tanneeru
Summary: Green synthesis of nanoparticles has become an efficient and eco-friendly approach, with various biological reduction agents being explored globally to minimize the use of toxic chemicals. This study successfully synthesized zinc oxide nanoparticles using plant extracts, and characterized the resulting nanopowder through analytical techniques such as X-ray diffraction and transmission electron microscopy.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Article
Chemistry, Organic
Chitrala Teja, Hanumanthu Roshini, Pandurangan Thiyagamurthy, J. Arul Daniel, S. Asha Devi, R. Vidya, Fazlur Rahman Nawaz Khan
Summary: A series of quinoline-chalcones were synthesized through one-pot Friedlander annulation followed by Claisen-Schmidt condensation in the presence of tetrabutylammonium ionic liquids. The use of tetrabutylammonium ionic liquids as a catalyst and base medium under microwave irradiation proved to be an efficient approach for C-C bond formation. The synthesized compounds were evaluated for their antimicrobial, antioxidant, and anticancer properties, and structure-activity relationship studies were conducted to improve pharmacological activities.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Chemistry, Organic
Eethamukkala Ubba, Fazlur-Rahman Nawaz Khan, Chitrala Teja, Ramesh Dalavai
Summary: A facile one-pot domino aldol condensation/Michael addition/Sonogashira coupling reaction was developed using a Pd/Cu catalyst system. This methodology allows for the synthesis of highly functionalized compounds in a mild and efficient manner.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Engineering, Chemical
Mohamad Reda A. Refaai, U. Tamilarasan, K. Dilip Kumar, M. Karthe, C. Anbu, Simon Yishak
Summary: Despite variations in diameter and location, pineapple leaf fibers showed consistent mechanical properties when used in pineapple leaf fiber-vinyl ester composites. Additionally, more delicate bundles were found to enhance the strength characteristics of the composites.
ADVANCES IN POLYMER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Naveen Kumar Reddy Bogireddy, Abdel Ghafour El Hachimi, Yetzin Rodriguez Mejia, Mohan Kumar Kesarla, Rajender S. Varma, Raul Herrera Becerra, Vivechana Agarwal
Summary: In this study, a highly reusable, non-toxic catalyst was developed for the effective removal of 4-nitrophenol (4-NP) from marine water. The catalyst showed exceptional catalytic activity and reusability in various water samples, and demonstrated excellent stability in marine water.
Article
Chemistry, Multidisciplinary
Nalinee Kanth Kadiyala, Badal Kumar Mandal, L. Vinod Kumar Reddy, Crispin H. W. Barnes, Luis De Los Santos Valladares, Dwaipayan Sen
Summary: This study presents a one-pot solvothermal synthetic pathway for the preparation of uniformly dispersed ZrO2/rGO nanocrystals using the aqueous leaf extract of Andrographis paniculata. The synthesized nanocrystals exhibited dose-dependent cytotoxicity on human cancer cell lines (A549 and HCT116) and had the ability to induce apoptosis. The green synthesis of ZrO2/rGO nanocrystals shows potential in developing efficient therapeutic agents for cancer therapy.
Article
Chemistry, Multidisciplinary
Nishanthi Vasanthi Sridharan, Badal Kumar Mandal
Summary: In this study, a novel electrochemical sensing platform is developed by modifying the glassy carbon electrode with ethylenediaminetetraacetic acid (EDTA)-functionalized reduced graphene oxide (ErGO). This platform enables the low-cost simultaneous quantitation of toxic heavy-metal ions, lead and cadmium, in water samples.
Article
Materials Science, Multidisciplinary
T. V. K. Karthik, H. Martinez-Garcia, F. Ortiz-Chi, C. G. Espinosa-Gonzalez, J. G. Torres-Torres, A. G. Hernandez, S. Godavarthi, M. K. Kesarla
Summary: This study investigated the CO2 sensing abilities of graphitic carbon nitride (g-C3N4) thin films obtained at different thermal oxidation temperatures. Bulk and exfoliated g-C3N4 were obtained through polycondensation and simultaneous thermal oxidation. Thin films of g-C3N4 were prepared for CO2 gas sensing studies. XRD and FTIR analysis confirmed the structure and functionalization of g-C3N4, and the exfoliation process led to increased sensing response for CO2. Highly exfoliated g-C3N4-based sensors exhibited fast response and recovery times. The results suggest that exfoliated g-C3N4 has the potential to be a competitive candidate for future CO2 sensor applications.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tathagata Kar, Maura Casales-Diaz, Socorro Valdez Rodriguez, Mohan Kumar Kesarla
Summary: Light-weight, porous carbon-based aerogels synthesized from zeolitic imidazolate framework (ZIF-8) particles and polymer agar are reported. The agar matrix allows for uniform dispersion of ZIF-8 and initiates the formation of hollow ZIF-8 particles. The resulting carbonized aerogel framework exhibits high porosity, excellent surface area, and predominantly amorphous phase due to the well-distributed hollow ZIF-8. The carbonized ZIF-8 aerogel shows a maximum specific capacitance of 124.86 F g-1 at 0.25 A g-1, attributed to the hollow ZIF-8 particles with reduced Zn-content and KOH activation.
Review
Biochemistry & Molecular Biology
Badal Kumar Mandal, Yong-Chien Ling
Summary: Color is the most important sensory factor for consumers and customers when it comes to food and beverages. Natural green colorants, being both appealing and nontoxic, have gained universal acceptance over synthetic ones. However, natural colorants are prone to degradation during processing and storage, posing challenges for their characterization. This review discusses the degradation, separation, and identification of chlorophylls and chlorophyllins, as well as the need for alternative analysis methods for accurate risk assessment and legislation purposes.
Article
Chemistry, Physical
Maria Esperanza Roman Abarca, Tathagata Kar, Maura Casales-Diaz, Jose Juan Ramos-Hernandez, Srinivas Godavarthi, Nayely Pineda-Aguilar, Victor Contreras, Manuela Calixto-Rodriguez, Mohan Kumar Kesarla
Summary: A carbon-based heterojunction using exfoliated graphitic carbon nitride and porous carbon derived from zeolitic imidazolate framework is developed for efficient removal of chromium (VI) from water.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
