Article
Polymer Science
Lucia Rubino, Giulio Torrisi, Luigi Brambilla, Luca Rubino, Marco Aldo Ortenzi, Maurizio Galimberti, Vincenzina Barbera
Summary: Polyurethane nanocomposites with functionalized nanosized high surface area graphite (G-OH) were prepared. The G-OH showed improved dispersion in a polyol and resulted in polyurethane with a larger temperature range and better mechanical features. The functionalization of graphene layers occurred on the edges, and the reactivity of hydroxylated aromatic rings with isocyanate groups was demonstrated. Therefore, G-OH can act as a multifunctional building block of polyurethane for versatile material applications.
Article
Chemistry, Multidisciplinary
Jiawei Sun, Yuan Chen, Sherif Shaban Ragab, Wei Gu, Ziqiang Tang, Yuexun Tang, Wenjun Tang
Summary: In this study, an unsaturation-functionalization strategy was applied to address the C19-hydroxylation issue for efficient synthesis of polyhydroxylated steroids. The synthetic method featured an effective asymmetric dearomative cyclization and various reactions to introduce the polyhydroxy functionalities. Ultimately, the total synthesis of 19-hydroxysarmentogenin and ouabagenin was achieved, demonstrating the synthetic versatility and practicality of these polyhydroxylated steroids in the search for new therapeutic agents.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Inmaculada Martin-Torres, Gala Ogalla, Jin-Ming Yang, Antonia Rinaldi, Antonio M. Echavarren
Summary: Chiral gold(I)-cavitand complexes exhibit high enantioselectivity in the enantioselective alkoxycyclization of 1,6-enynes, which is significant for the synthesis of carbazole alkaloids. Furthermore, the cavity effect of the gold(I) complexes induces constrained conformations of enynes in the cycloisomerization of dienynes, leading to high stereoselectivity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Multidisciplinary Sciences
Sangbin Park, Gyumin Kang, Chansu Kim, Dongwook Kim, Sunkyu Han
Summary: Securinega alkaloids have been a subject of interest in synthetic chemistry for a long time. This study presents a synthetic solution to accessing high-oxidation state securinega alkaloids by completing the total synthesis of various C4-oxygenated securinine-type alkaloids. The discoveries in this study offer a fundamental synthetic solution to all known securinine-type natural products and could be useful for systematic biological studies.
NATURE COMMUNICATIONS
(2022)
Article
Mathematical & Computational Biology
Yuewu Liu, Mengfang Zeng, Shengyong Liu, Chun Li
Summary: Virus assembly is a crucial step in virus replication and offers potential drug targets. This process involves the polymerization of virus structural protein monomers into building blocks, which then assemble into virus shells. In this study, we developed five dynamical models to describe the synthesis reactions for different types of building blocks. We proved the existence and uniqueness of positive equilibrium solutions for each model and analyzed the stability of these equilibrium states. Our results suggest that the concentration of dimer building blocks decreases as the ratio of off-rate constant to on-rate constant increases. Similarly, trimer building blocks decrease with an increasing ratio of off-rate constant to on-rate constant. These findings provide insights into the dynamic properties of virus-building block synthesis in vitro.
MATHEMATICAL BIOSCIENCES AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Debashis Dhara, Ashis Dhara, Jack Bennett, Paul Murphy
Summary: This personal account focuses on the synthesis of polyhydroxylated piperidines, a subset of compounds within the iminosugar family, using various cyclisation methods and enantiomerically pure precursors to obtain substituted piperidines. The laboratory has contributed cascades based on reductive amination and Huisgen azide-alkene cycloaddition for the synthesis of substituted piperidines with quaternary centres adjacent to nitrogen.
Article
Chemistry, Multidisciplinary
Chuanyong Wang, Qingliang Yang, Yuan-Hao Dai, Jianqi Xiong, Yu Zheng, Wei-Liang Duan
Summary: This study presents the first nickel-catalyzed synthesis of P-stereogenic secondary aminophosphine-boranes through the asymmetric addition of primary phosphines to azo compounds. The versatility of these synthesized P-stereogenic compounds allows for the facile synthesis of both known and novel P-stereogenic compounds through sequential and stereospecific reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Yu Zhu, Siyue Liu, Johnny Zigmond, Kevin M. Kaltenbronn, Kendall J. Blumer, Kevin D. Moeller
Summary: YM-254890 and FR900359 are effective and selective inhibitors of the Gq/11 signaling pathway, making them attractive targets for synthesis and biological studies. However, a versatile synthetic approach that allows for the rapid construction of various non-natural and labeled analogs, as well as an increase in the availability of those analogs, remains elusive. This study presents a convergent building block approach to address this challenge.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Geography
Parastoo Pilehforooshha, Mohammad Karimi, Ali Mansourian
Summary: This article proposes a novel model combining building block displacement and building block area reduction for resolving spatial conflicts, using an improved objective function immune genetic algorithm for displacement and a building segment partitioning model for area reduction. The proposed model has improved correctness and completeness for resolving conflicts compared to recent models.
TRANSACTIONS IN GIS
(2021)
Article
Chemistry, Multidisciplinary
Freya Taday, Ryan Cairns, Adam O'Connell, Elaine O'Reilly
Summary: A hybrid bio-organocatalytic cascade method was developed for the synthesis of 2-substituted piperidines, utilizing a transaminase to generate a key reactive intermediate for the Mannich reaction.
CHEMICAL COMMUNICATIONS
(2022)
Review
Chemistry, Organic
Paula Franova, Stefan Marchalin
Summary: This review presents the latest developments in the synthesis of naturally occurring polyhydroxylated indolizidines and their synthetic enantiomers. Several novel polyhydroxylated indolizidines with inhibitory activity are reported.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Amir Tavakoli, Gregory B. Dudley
Summary: This article describes two divergent and complementary methodologies for preparing neopentylene-tethered (NPT) 1,6-diynes. These molecules are valuable for reaction discovery and target-oriented synthesis. The methods involve ring-opening fragmentation of dimedone (and alkylation) or one-pot dehydration with optional saponification. The resulting compounds can be further functionalized using traditional chemistry techniques.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
De-Li Ma, Cheng Qian, Qiao-Yan Qi, Zhong-Ri Zhong, Guo-Fang Jiang, Xin Zhao
Summary: The principle of reticular chemistry is widely used in designing crystalline porous materials like MOFs and COFs. Recent research has shown that the connecting sequence of building blocks plays a crucial role in determining the crystalline structures of COFs. The article establishes a model system to demonstrate the impact of different connecting sequences on COFs structures and verifies it through target synthesis.
Article
Chemistry, Organic
Santosh J. Gharpure, Raj K. Patel, Krishna S. Gupta
Summary: Stereoselective syntheses of pyrrolidines and piperidines bearing hydrophobic chains were achieved through a metal-free, Lewis acid-mediated 5/6-endo-dig reductive hydroamination cascade of enynyl amines. The developed strategy allowed for the collective stereoselective total synthesis of various alkaloids, including (& PLUSMN;)-pyrrolidine cis-225H, (& PLUSMN;)-epi-197B, (& PLUSMN;)-epi-225C, the family of (+)-solenopsins and (+)-isosolenopsins, and the formal synthesis of (& PLUSMN;)-bgugaine and (+)-azimic acid.
Article
Chemistry, Multidisciplinary
Jeonghyun Kim, Namho Kim
Summary: This study investigates the feasibility of recycling waste paving blocks as raw materials for concrete. The results show that the performance of concrete mixtures decreases with increasing replacement ratio of waste clay and concrete, while the addition of waste granite improves the properties of the mixtures.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Medicinal
Marcus J. C. Long, Ann P. Lawson, Rick Baggio, Yu Qian, Lior Rozhansky, Domenico Fasci, Farid El Oualid, Eranthie Weerapana, Lizbeth Hedstrom
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
(2019)
Correction
Chemistry, Multidisciplinary
Saba Parvez, Marcus J. C. Long, Jesse R. Poganik, Yimon Aye
Article
Chemistry, Multidisciplinary
Hem Raj Khatri, Bijay Bhattarai, Will Kaplan, Zhongzheng Li, Marcus John Curtis Long, Yimon Aye, Pavel Nagorny
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Review
Biochemistry & Molecular Biology
Marcus J. C. Long, Xuyu Liu, Yimon Aye
CURRENT OPINION IN CHEMICAL BIOLOGY
(2019)
Article
Biochemistry & Molecular Biology
Marcus J. C. Long, Lingxi Wang, Yimon Aye
ANTIOXIDANTS & REDOX SIGNALING
(2020)
Review
Biochemistry & Molecular Biology
Marcus J. C. Long, Alexandra Van Hall-Beauvais, Yimon Aye
CURRENT OPINION IN CHEMICAL BIOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Jesse R. Poganik, Alexandra K. Van Hall-Beauvais, Marcus J. C. Long, Michael T. Disare, Yi Zhao, Yimon Aye
HELVETICA CHIMICA ACTA
(2020)
Article
Chemistry, Multidisciplinary
Xuyu Liu, Marcus J. C. Long, Benjamin D. Hopkins, Chaosheng Luo, Lingxi Wang, Yimon Aye
ACS CENTRAL SCIENCE
(2020)
Review
Chemistry, Multidisciplinary
Marcus J. C. Long, Chloe Rogg, Yimon Aye
Summary: The article provides a personal account of the innovation and design principles behind REX technologies, which aim to interrogate precision electrophile signaling in cells and organisms. By developing methods like T-REX and G-REX, the researchers have been able to gain new insights into target engagement and design of covalent medicines.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Multidisciplinary Sciences
Yi Zhao, Pierre A. Miranda Herrera, Dalu Chang, Romain Hamelin, Marcus J. C. Long, Yimon Aye
Summary: Enzyme-assisted posttranslational modifications (PTMs) play a major role in signaling across cellular compartments. However, the impact of nonenzymatic PTMs on cross-compartment signaling is not well understood. This study establishes a quantitative platform to assess the responsivity of compartmentalized subproteomes to nonenzymatic PTMs, revealing that a significant number of protein sensors respond in compartments of nonprimary origin or where their canonical activity is inoperative.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Jesse R. Poganik, Kuan-Ting Huang, Saba Parvez, Yi Zhao, Sruthi Raja, Marcus J. C. Long, Yimon Aye
Summary: The study investigates the mechanism of action of dimethyl fumarate on innate immune cell toxicity, revealing that it modifies Keap1 to trigger mitochondrial-targeted neutrophil/macrophage apoptosis. Despite the importance of reactive electrophilic drugs, deconvolution of their principal targets remains difficult due to lack of genetic tractability and interference by non-specific compounds during validation.
NATURE COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Marcus J. C. Long, Phillippe Ly, Yimon Aye
Summary: Covalent drugs have re-emerged as a promising approach in drug discovery and design due to their ability to prolong target engagement and target shallower binding sites. Development of covalent drugs involves frameworks like identifying electrophile-sensing residues and studying innate signaling by endogenous molecules to predict drug mechanism and behavior.
RSC MEDICINAL CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Marcus J. C. Long, Kuan-Ting Huang, Yimon Aye
Summary: This tutorial review compares and contrasts the chemical mechanisms of electrophile/oxidant sensing and the molecular mechanisms of signal propagation. It critically analyzes biological systems where these pathways are believed to be present and discusses the implications of the data. Finally, it explores the applications of this knowledge in disease treatment and drug development.
CHEMICAL SOCIETY REVIEWS
(2021)
Review
Biochemistry & Molecular Biology
Marcus J. C. Long, Yi Zhao, Yimon Aye
RSC CHEMICAL BIOLOGY
(2020)
Article
Biochemistry & Molecular Biology
Marcus J. C. Long, Yi Zhao, Yimon Aye
CELL CHEMICAL BIOLOGY
(2020)