Article
Chemistry, Medicinal
Woong Sub Byun, Hyewon Lim, Junhwa Hong, Eun Seo Bae, Seok Beom Lee, Younggwan Kim, Jeeyeon Lee, Sang Kook Lee, Suckchang Hong
Summary: The compound MC0704, a synthetic STAT3 pathway inhibitor, showed potential antitumor activity in docetaxel-resistant TNBC cells. It effectively inhibited the metastatic potential of the cells in vitro and exhibited strong antitumor activity when combined with docetaxel in a xenograft mouse model. MC0704 could be a potential therapeutic agent for TNBC patients with docetaxel resistance.
JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Review
Microbiology
Jinjin Zhu, Yang Wang, Yuanyuan Cao, Jilong Shen, Li Yu
Summary: Research on Toxoplasma gondii microneme proteins (MICs) has shown their important role in host cell attachment, invasion, motility, and pathogenesis. Specifically focusing on the TgMIC1/4/6 complex can help improve understanding of T. gondii infection and provide a basis for effective control strategies.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Chemistry, Physical
Khaled M. Darwish, Ahmad Abdelwaly, Asmaa M. Atta, Mohamed A. Helal
Summary: The synthesized compounds showed potential in inhibiting PDE4 and exhibited good selectivity and specific interactions at the PDE4 active site.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Oncology
Xiaoyan Xing, Fahui Li, Yajie Hu, Lin Zhang, Qian Hui, Hongyu Qin, Qixiao Jiang, Wenyan Jiang, Chunyan Fang, Lei Zhang
Summary: This study identified potent APN inhibitors that could be used as lead compounds for tumor chemo-sensitization and cancer stem cell-based therapies.
FRONTIERS IN ONCOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Hari Krishna Namballa, Pratibha Anchi, Kesari Lakshmi Manasa, Jay Prakash Soni, Chandraiah Godugu, Nagula Shankaraiah, Ahmed Kamal
Summary: In this study, a series of beta-carboline-cinnamide conjugates were synthesized and one compound, 7h, displayed superior HDAC inhibitory activity and antiproliferative activity against cancer cell lines. Compound 7h showed promising potential for further investigation as a novel anti-cancer drug targeting HDACs.
BIOORGANIC CHEMISTRY
(2021)
Article
Parasitology
Xinchao Liu, Chunjing Li, Xiaoyu Li, Muhammad Ehsan, Mingmin Lu, Ke Li, Lixin Xu, Ruofeng Yan, Xiaokai Song, XiangRui Li
Summary: The study revealed the significant role of eIF-5A in T. gondii transmission and pathogenicity by regulating tachyzoite growth, protein synthesis, invasion process, and parasite replication. These findings provide new insights for the development of targeted drugs for controlling T. gondii infection.
PARASITES & VECTORS
(2021)
Review
Chemistry, Applied
Siti Zafirah Zulkifli, Noor Hidayah Pungot, Aimi Suhaily Saaidin, Nor Akmalazura Jani, Mohd Fazli Mohammat
Summary: This review summarizes the synthetic pathways and bioactivity of substituted indole beta-carboline reported from 2005 to date. These compounds have various pharmacological effects, offering potential for the development of new medications for the treatment of various ailments.
NATURAL PRODUCT RESEARCH
(2023)
Article
Parasitology
Yang Wang, Chengjian Han, Rongsheng Zhou, Jinjin Zhu, Famin Zhang, Jingyang Li, Qingli Luo, Jian Du, Deyong Chu, Yihong Cai, Jilong Shen, Li Yu
Summary: The study revealed significant differences in the protein level of TgMIC1 between the high-virulence strain TgCtwh3 and low-virulence strain TgCtwh6, with the TgMIC1 polyclonal antibody inhibiting the invasion and proliferation of TgCtwh3. These findings suggest that the differential expression of TgMIC1 may partly explain the virulence mechanism in this atypical genotype.
PARASITES & VECTORS
(2021)
Article
Biochemistry & Molecular Biology
Min Chen, Lijie Yao, Lijuan Zhou, Pei Yang, Weihao Zou, Liqing Xu, Shengmin Li, Hongjuan Peng
Summary: TgROP18(I) inhibits type I interferon responses to facilitate parasitic replication in various host cells.
Article
Microbiology
Hugo Bisio, Aarti Krishnan, Jean-Baptiste Marq, Dominique Soldati-Favre
Summary: This study identifies the role of a type P4-ATPase and its chaperone CDC50 in regulating microneme exocytosis in apicomplexan parasites. The researchers found that this protein complex is responsible for maintaining the asymmetric distribution of phosphatidylserine in the parasite plasma membrane, which is crucial for microneme fusion with the plasma membrane. These findings highlight the importance of membrane homeostasis and lipid composition in controlling microneme secretion.
Article
Chemistry, Physical
Zhenguo Zhang, Xiaoxiao Liu, Liang Ji, Ting Zhang, Zhenhua Jia, Teck-Peng Loh
Summary: This study reveals the synthesis of diverse tetrahydro-beta-carbolines and spirocyclic tetrahydro-beta-carbolines through the unprecedented triarylcarbonium ion-pair-catalyzed reaction in water under metal-free conditions. The reaction shows good yields and excellent functional group tolerance, allowing for late-stage modification of natural products and small molecular drugs.
Article
Chemistry, Analytical
David Smith, Matteo Lunghi, Einar B. Olafsson, Olivia Hatton, Manlio Di Cristina, Vern B. Carruthers
Summary: A new platform for screening compounds with anti-bradyzoite activity has been developed, using a luciferase-based system to determine bradyzoite survival in vitro.
ANALYTICAL CHEMISTRY
(2022)
Article
Biology
Karla Marie Marquez-Nogueras, Miryam Andrea Hortua Triana, Nathan M. Chasen, Ivana Y. Kuo, Silvia N. J. Moreno
Summary: This study identified a novel ion channel, TgTRPPL-2, in Toxoplasma gondii that plays a role in Ca2+ signaling and may stimulate parasite motility, invasion, and egress through a Ca2+ signaling cascade. TgTRPPL-2 represents a potential target for combating toxoplasmosis.
Article
Chemistry, Multidisciplinary
Rina Mahato, Chinmoy Kumar Hazra
Summary: In this study, pentafluorophenol was revealed as an effective catalyst for the synthesis of (spirocyclic) tetrahydro-beta-carbolines via the Pictet-Spengler reaction. This straightforward catalytic system operates under mild conditions, yielding indole alkaloids in excellent yield and exhibiting remarkable functional group tolerance, including late-stage modifications. This transformation provides a practical and adaptable approach for the gram-scale synthesis of the natural alkaloid Komavine and enables the synthesis of the commercial drug Tadalafil.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Jinmei Zhu, Lu Yang, Jiequn Wu, Zixin Deng, Xudong Qu
Summary: By improving the specificity synthesis method for sterically hindered amines, researchers successfully synthesized the important 1-aryl-tetrahydro-beta-carboline framework, providing a new approach for its application in natural products and pharmaceuticals.
Article
Chemistry, Multidisciplinary
Subeesh Madayanad Suresh, Le Zhang, David Hall, Changfeng Si, Gaetano Ricci, Tomas Matulaitis, Alexandra M. Z. Slawin, Stuart Warriner, Yoann Olivier, Ifor D. W. Samuel, Eli Zysman-Colman
Summary: NOBNacene is a rare example of a p- and n-doped nonacene compound with linearly extended ladder-type multiresonant thermally activated delayed fluorescence (MR-TADF) emission. It exhibits efficient narrow deep blue emission with a PL wavelength of 410 nm, FWHM of 38 nm, PL quantum yield of 71%, and delayed lifetime of 1.18 ms. The OLED using NOBNacene as the emitter shows a comparable electroluminescence spectrum with a peak at 409 nm and a maximum external quantum efficiency (EQE(max)) of 8.5% at CIE coordinates of (0.173, 0.055). The EQE(max) is increased to 11.2% with 3 wt% doping of the emitter in the emissive layer, resulting in a slightly broadened electroluminescence spectrum with CIE coordinates of (0.176, 0.068).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Crystallography
Fatin Nur Ain Abdul Rashid, Muhamad Zulfaqar Bacho, Alexandra M. Z. Slawin, Mohd Abdul Fatah Abdul Manan, Saiful Azmi Johari, Mohd Fazli Mohammat
Summary: The substance is triclinic with space group P (1) over bar (no. 2). The cell parameters are a = 7.9179(7) angstrom, b = 10.1982(9) angstrom, c = 10.4144(8) angstrom, alpha = 76.184(7) degrees, beta = 87.090 (7) degrees, gamma = 73.500(8) degrees. The volume of the unit cell is 782.86(12) angstrom(3), and there are 2 molecules in the lattice. The R-gt(F) value is 0.0458, and the wR(ref)(F-2) value is 0.1333. The temperature is 93 K.
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
(2023)
Article
Crystallography
R. Alan Aitken, Alexander J. B. Nelson, Alexandra M. Z. Slawin, Dheirya K. Sonecha
Summary: Thirteen new crystal structures of cyclic NH carboximides have been determined and compared based on their intermolecular hydrogen bonding patterns. The structures include a new cyclobutane-fused succinimide, seven new simple bi- and tricyclic succinimides derived from Diels-Alder reactions, three methylated glutarimides, a morpholinedione and adipimide, and the first seven-membered ring NH carboximide to be characterized. The compounds were found to adopt ribbon structures, centrosymmetric dimers, and bonding between NH and a remote bridging ether oxygen. Halogen bonding was also observed in one case.
Article
Chemistry, Inorganic & Nuclear
Hang Liu, Hassan Hafeez, David B. Cordes, Alexandra M. Z. Slawin, Gavin Peters, Stephen L. Lee, Ifor D. W. Samuel, Finlay D. Morrison
Summary: In this work, a novel inorganic halide Cs10MnSb6Cl30 with a distinctive 10H perovskite polytype structure is reported. The Cs10MnSb6Cl30 has 30% B-site vacancies ordered at both corner-and face-sharing sites, resulting in a reduction of octahedral connectivity to 1D and enhanced photoluminescence. This study demonstrates the existence of the 10H perovskite structure in halides and the potential of vacancy rearrangements to tune the optical properties of perovskite polytypes.
INORGANIC CHEMISTRY
(2023)
Article
Crystallography
R. Alan Aitken, Alexandra M. Z. Slawin, Dheirya K. Sonecha
Summary: This paper reports the crystal structures of 2,5-dihydrothiophene 1,1-dioxide and 2,3-dihydrothiophene 1,1-dioxide, which show perfectly planar rings with expected bond lengths and angles. In contrast, the halogenated derivatives 3,3,4,4-tetrachlorotetrahydrothiophene 1,1-dioxide and 2,3-dibromotetrahydrothiophene 1,1-dioxide exhibit twisted conformations. The degree of planarity is compared with similar 5-membered ring cyclic sulfones, and the C-H...O hydrogen bonding patterns are discussed.
JOURNAL OF CHEMICAL CRYSTALLOGRAPHY
(2023)
Article
Chemistry, Organic
Yihong Wang, Claire M. M. Young, David B. B. Cordes, Alexandra M. Z. Slawin, Andrew D. D. Smith
Summary: The isothiourea-catalyzed formal [2+ 2] cycloaddition of C(1)-alkyl and C(1)-unsubstituted ammonium enolates with beta- and alpha,beta-substituted trifluoromethylenones has been developed. The reaction exhibited preferential [2 + 2]-cycloaddition over the alternative [4 + 2]-cycloaddition, resulting in beta-lactones with excellent diastereo- and enantioselectivity. The regioselectivity of the reaction was determined by the substituents on both reactants.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Jan U. Bergsch, Alexandra M. Z. Slawin, Petr Kilian, Brian A. Chalmers
Summary: Researchers successfully synthesized two new types of Sb(III) and Sb(V) peri-substituted acenaphthene phosphorus-antimony compounds. The Sb(III) compound, 1, was prepared by reacting the organolithium precursor with dichloro(p-tolyl)stibine, and 2 was prepared by chlorination of 1. Both compounds were characterized by multinuclear (H-1, C-13, and P-31) NMR spectroscopy and their molecular structures were resolved by single-crystal X-ray diffraction. Both compounds exhibit a dative P-Sb interaction with antimony serving as the Lewis acidic acceptor group.
Article
Chemistry, Physical
Suman Mandal, Mitali Sarkar, Shanku Denrah, Arka Bagchi, Arunima Biswas, David B. Cordes, Alexandra M. Z. Slawin, Nitis Chandra Saha
Summary: A new pyrazole Schiff-base ligand and its two Ni(II) complexes have been synthesized and characterized. The complexes show promising catalytic and anticancer activities.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Pagidi Sudhakar, Alexandra Slawin, Eli Zysman-Colman
Summary: This article reports the synthesis and optoelectronic characterization of several luminescent materials, and explains the changes in their luminescent properties in polymer films, revealing that some of these materials exhibit delayed fluorescence and reversible photoluminescent response.
FRONTIERS IN CHEMISTRY
(2023)
Article
Chemistry, Organic
R. Alan Aitken, Lynn A. Power, Alexandra M. Z. Slawin
Summary: X-ray diffraction analysis confirmed that the product formed by base-induced dimerization matches the described compound structure, rather than the previously proposed isomeric structure. Additionally, a similar compound derived from a different substrate was obtained and characterized.
Article
Chemistry, Organic
R. Alan Aitken, Alexandra H. Campbell, Chloe E. Fletcher, Alexandra M. Z. Slawin
Article
Chemistry, Multidisciplinary
Alastair J. Nimmo, Jacqueline Bitai, Claire M. Young, Calum McLaughlin, Alexandra M. Z. Slawin, David B. Cordes, Andrew D. Smith
Summary: This study demonstrates an unusual reversible Michael addition reaction, using an isothiourea as a Lewis base catalyst, which produces stereoselective products. The basicity of the reaction conditions and the reactivity of the catalyst affect the selectivity of the products. By combining the reversible Michael addition with a crystallisation-induced diastereomer transformation, high yields and stereocontrol of the products can be achieved.
Article
Materials Science, Multidisciplinary
Ettore Crovini, Rama Dhali, Dianming Sun, Tomas Matulaitis, Thomas Comerford, Alexandra M. Z. Slawin, Cristina Sissa, Francesco Azzolin, Francesco Di Maiolo, Anna Painelli, Eli Zysman-Colman
Summary: We have studied the synthesis, optoelectronic properties, and theoretical analysis of DMAC-py-TRZ, a novel TADF emitter. The structural difference between DMAC-py-TRZ and DMAC-TRZ leads to significant changes in their steric interactions and photophysics. While the bent structure of DMAC-py-TRZ hinders TADF, emission can be observed from a relaxed orthogonal excited-state geometry. The presence of both conformers in amorphous matrices contributes to the efficiency of DMAC-py-TRZ devices through efficient energy transfer.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
John Marques dos Santos, Chin-Yiu Chan, Shi Tang, David Hall, Tomas Matulaitis, David B. Cordes, Alexandra M. Z. Slawin, Youichi Tsuchiya, Ludvig Edman, Chihaya Adachi, Yoann Olivier, Eli Zysman-Colman
Summary: Two novel p-extended amine/carbonyl-based multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters have been designed and synthesized. The two emitters are isomeric, composed of nine fused rings and show green-yellow emission. Sym-DiDiKTa and Asym-DiDiKTa possess tert-butyl groups distributed in a symmetrical and asymmetrical fashion, respectively, which significantly impact the single-crystal packing structure. The devices with Sym-DiDiKTa and Asym-DiDiKTa displayed electroluminescence maxima of 543 and 544 nm, and maximum external quantum efficiencies (EQE(max)) of 9.8% and 10.5%, respectively. The maximum EQE was further improved to 19.9% by employing a hyperfluorescence strategy. The LEC with Sym-DiDiKTa as the emitter showed a ?(EL) at 551 nm and FWHM of 60 nm with luminance of 300 cd m(-2) and a fast turn-on time of less than 2 s to 100 cd m(-2).
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Dongyang Chen, Le Zhang, Tomas Matulaitis, David B. Cordes, Alexandra M. Z. Slawin, Xiao-Hong Zhang, Ifor D. W. Samuel, Eli Zysman-Colman
Summary: By judicious molecular engineering, the efficiency of the triplet exciton harvesting mechanisms in OLEDs can be modulated, leading to improved device efficiency.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Organic
Faiza Diaba, Gisela Trenchs
Summary: The first violet light-mediated synthesis of gamma- and delta-lactams from N-alkenyl trichloroacetamides is reported in this paper. The reactions are conducted in tetrahydrofuran or 2-methyltetrahydrofuran as the sole solvent without catalysts or additives, under non-anhydrous conditions in an air atmosphere where the solvent serves as the radical initiator.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Feroze Hussain, Sajjad Ahmed, Ashiq Hussain Padder, Qazi Naveed Ahmed
Summary: This study reports a novel and efficient one-pot synthesis method for mixed phosphorotrithioates, which does not require supplementary additives and shows broad applicability.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Hyunjin Oh, Ikyon Kim
Summary: A new 1,2,4-triazole-pyrrolo[1,2-a]pyrazine hybrid system, 6-acylpyrrolo[1,2-a][1,2,4]triazolo[5,1-c]pyrazine, was synthesized using a catalyst-free method. This method involved sequential exposure of pyrrole-2-carbonitrile-derived substrates to DMF-DMA and acyl hydrazide, resulting in the formation of acylated pyrazine and 1,2,4-triazole rings, enabling the installation of various substituents at specific positions on the core skeleton.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Ming Yan, Si-fan Wang, Yong-po Zhang, Jin-zhong Zhao, Zhuo Tang, Guang-xun Li
Summary: Here we developed an efficient photocatalytic approach for the convenient preparation of sulfinamides. The reaction allows for the gram-scale preparation of sulfinamides and the one-pot synthesis of various sulfonyl amides.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Farzaneh Bandehali-Naeini, Zahra Tanbakouchian, Noushin Farajinia-Lehi, Nicolas Mayer, Morteza Shiri, Martin Breugst
Summary: Two tandem catalytic systems were developed for the synthesis of novel 3,4-disubstituted maleimides using the same Ugi adducts. Different maleimide structures can be synthesized using either Pd or Cu catalysis.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Tanya Raghava, Anjan Chattopadhyay, Subhadeep Banerjee, Nivedita Sarkar
Summary: Amine substitution of two ortho fluorine atoms of tetrafluoroterephthalonitrile through SNAr chemistry is easily achievable. But further fluorine substitution is only possible under forcing conditions, yielding valuable fluorophores for bioimaging.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Review
Chemistry, Organic
Anju Chadha, Santosh Kumar Padhi, Selvaraj Stella, Sowmyalakshmi Venkataraman, Thangavelu Saravanan
Summary: Alcohol dehydrogenases are enzymes that use cofactors for oxidation or reduction reactions of alcohols or carbonyl compounds. They are utilized in green chemistry and have applications in the production of pharmaceuticals. Recombinant enzymes have solved the challenge of producing purified enzymes in large quantities. Engineered alcohol dehydrogenases have been used in asymmetric synthesis in industry. Various methods have been established for regenerating expensive cofactors to make the enzymatic process more efficient and economically viable.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)