Using UHPLC–MS profiling for the discovery of new sponge-derived metabolites and anthelmintic screening of the NatureBank bromotyrosine library

• Sasha Hayes,
• Aya C. Taki,
• Kah Yean Lum,
• Joseph J. Byrne,
• Merrick G. Ekins,
• Robin B. Gasser and
• Rohan A. Davis

Beilstein J. Org. Chem. 2022, 18, 1544–1552, doi:10.3762/bjoc.18.164

• . Chemical structures of 5-debromopurealidin H (1) and ianthesine E (2). Key COSY, HMBC and ROESY correlations for 5-debromopurealidin H (1). Chemical structures of the NatureBank bromotyrosine derivatives: psammaplysins F (3) and H (4), bastadins 4 (5), 8 (6) and 13 (7), aerothionin (8) and hexadellin A (9

Ionic multiresonant thermally activated delayed fluorescence emitters for light emitting electrochemical cells

• Merve Karaman,
• Abhishek Kumar Gupta,
• Subeesh Madayanad Suresh,
• Tomas Matulaitis,
• Lorenzo Mardegan,
• Daniel Tordera,
• Henk J. Bolink,
• Sen Wu,
• Stuart Warriner,
• Ifor D. Samuel and
• Eli Zysman-Colman

Beilstein J. Org. Chem. 2022, 18, 1311–1321, doi:10.3762/bjoc.18.136

• nm, ΦPL = 61%, τd = 242 μs, kRISC = 3.04 × 103 s−1, 1 wt % in mCP). Different strategies were explored to prepare LEECs based on DiKTa-OBuIm and DiKTa-DPA-OBuIm as emitters. The devices showed green and red emission, respectively. Chemical structures of (a) reported ionic TADF emitters for LEECs, (b

Molecular diversity of the base-promoted reaction of phenacylmalononitriles with dialkyl but-2-ynedioates

• Hui Zheng,
• Ying Han,
• Jing Sun and
• Chao-Guo Yan

Beilstein J. Org. Chem. 2022, 18, 991–998, doi:10.3762/bjoc.18.99

• in the reaction. Because there is only one chiral carbon atom in the molecule, there are no diastereoisomers in the obtained products 3a–l. The chemical structures of compounds 3a–l were fully characterized by IR, HRMS, 1H and 13C NMR spectra. As for an example, the 1H NMR spectrum of compound 3i

• clearly indicated that only one diastereoisomer was actually produced in the reaction. The chemical structures of the compounds 4a–k were established by various spectroscopy methods. Additionally, the single crystal structures of compounds 4a and 4c were successfully determined (Figure 2 and Figure 3

Anti-inflammatory aromadendrane- and cadinane-type sesquiterpenoids from the South China Sea sponge Acanthella cavernosa

• Shou-Mao Shen,
• Qing Yang,
• Yi Zang,
• Jia Li,
• Xueting Liu and
• Yue-Wei Guo

Beilstein J. Org. Chem. 2022, 18, 916–925, doi:10.3762/bjoc.18.91

• following the manufacturer’s instructions. β-ACTIN was used as the normalization control. All reactions were performed in triplicate. The NF-κB inhibitor Bay 11-7082 (5 μM) was used as a positive control. Chemical structures of compounds 1–8. ORTEP drawing of 2 (displacement ellipsoids are drawn at the 50

Efficient production of clerodane and ent-kaurane diterpenes through truncated artificial pathways in Escherichia coli

• Fang-Ru Li,
• Xiaoxu Lin,
• Qian Yang,
• Ning-Hua Tan and
• Liao-Bin Dong

Beilstein J. Org. Chem. 2022, 18, 881–888, doi:10.3762/bjoc.18.89

• ), have attracted great attention from chemists and biologists due to their intriguing chemical structures and broad pharmacological functions [1][2][3][4]. The vast structural diversity of diterpenoids arise biosynthetically from the following two stages: i) diterpene synthase (DTS, also called diterpene

• produced new peaks in the HPLC profiles after a 3-day fermentation. Larger scale (3 L) fermentations of DL10004 and DL10006 led to the isolation of 45 mg and 90 mg of terpentetriene and ent-kaurene, respectively, whose 1H and 13C NMR spectra supported their chemical structures (Figures S4–S7 in Supporting

Post-synthesis from Lewis acid–base interaction: an alternative way to generate light and harvest triplet excitons

• Hengjia Liu and
• Guohua Xie

Beilstein J. Org. Chem. 2022, 18, 825–836, doi:10.3762/bjoc.18.83

• nitrogen-containing heterocycles, resulting in the change of energy levels and spectra. The following will illustrate Lewis acids used in the exploration of luminescent materials and mechanisms due to Lewis acid–base interactions. The chemical structures of some candidate Lewis acids are shown in Figure 1

• ][32], e.g., organic thin-film transistors [45][46], organic photovoltaics [47], and chemical sensing [48]. Chemical structures of Lewis acid examples. Chemical structures of Lewis basic fluorescent polymer poly{2,5-pyridylene-co-1,4-[2,5-bis(2-ethylhexyloxy)]phenylene} 1 and D–A–D compound 2,5-bis((N

• vapor-treated device and the macroscopic gradation emissive pattern of polymer films on a glass plate after treatment and excited by 365 nm UV light. Figure 4 was reproduced from [31] with permission from The Royal Society of Chemistry. This content is not subject to CC BY 4.0. Chemical structures of

Terpenoids from Glechoma hederacea var. longituba and their biological activities

• Dong Hyun Kim,
• Song Lim Ham,
• Zahra Khan,
• Sun Yeou Kim,
• Sang Un Choi,
• Chung Sub Kim and
• Kang Ro Lee

Beilstein J. Org. Chem. 2022, 18, 555–566, doi:10.3762/bjoc.18.58

• + probability using an Excel sheet [25]. Chemical structures of compounds 1–9. Structure elucidation of 1. (A) Key COSY, HMBC, and NOE correlations of 1. (B) Comparison of calculated ECD data of 1a and experimental ECD spectrum of 1. Structure elucidation of 2. (A) Key COSY, HMBC, and NOE correlations of 2. (B

Comparative study of thermally activated delayed fluorescent properties of donor–acceptor and donor–acceptor–donor architectures based on phenoxazine and dibenzo[a,j]phenazine

• Saika Izumi,
• Prasannamani Govindharaj,
• Anna Drewniak,
• Paola Zimmermann Crocomo,
• Satoshi Minakata,
• Leonardo Evaristo de Sousa,
• Piotr de Silva,
• Przemyslaw Data and
• Youhei Takeda

Beilstein J. Org. Chem. 2022, 18, 459–468, doi:10.3762/bjoc.18.48

• theoretical calculations, the role of the additional donor unit in the TADF mechanism is boosting the rISC process by balancing the singlet–triplet energy gap and spin–orbit coupling. The results showcased herein would allow for designing efficient TADF emitters more flexibly in the future. Chemical

• structures of 1 and POZ-DBPHZ. Steady-state UV–vis absorption (Abs) and photoluminescence (PL) spectra of dilute solutions (c ≈ 10−5 M) of compound 1. The PL spectra were acquired with λex = 340 nm for the cyclohexane solution and λex = 360 nm for solutions in the other solvents. Time-resolved PL decay

Menadione: a platform and a target to valuable compounds synthesis

• Acácio S. de Souza,
• Ruan Carlos B. Ribeiro,
• Dora C. S. Costa,
• Fernanda P. Pauli,
• David R. Pinho,
• Matheus G. de Moraes,
• Fernando de C. da Silva,
• Luana da S. M. Forezi and
• Vitor F. Ferreira

Beilstein J. Org. Chem. 2022, 18, 381–419, doi:10.3762/bjoc.18.43

Amamistatins isolated from Nocardia altamirensis

• Till Steinmetz,
• Wolf Hiller and
• Markus Nett

Beilstein J. Org. Chem. 2022, 18, 360–367, doi:10.3762/bjoc.18.40

• at 630 nm in a microplate reader. The values were plotted and the DC50 values were calculated. All tests were run in triplicate. Chemical structures of amamistatins (1–5) and a putative biosynthetic shunt product (6) isolated in this study. 1: R1 = CHO, R2 = H, R3 = H; 2: R1 = CHO, R2 = H, R3 = OH; 3

Synthesis of novel [1,2,4]triazolo[1,5-b][1,2,4,5]tetrazines and investigation of their fungistatic activity

• Anna V. Korotina,
• Svetlana G. Tolshchina,
• Rashida I. Ishmetova,
• Natalya P. Evstigneeva,
• Natalya A. Gerasimova,
• Natalya V. Zilberberg,
• Nikolay V. Kungurov,
• Gennady L. Rusinov,
• Oleg N. Chupakhin and
• Valery N. Charushin

Beilstein J. Org. Chem. 2022, 18, 243–250, doi:10.3762/bjoc.18.29

• been found. All the above-mentioned results demonstrate good prospects for finding new antifungal drugs in this class of compounds. X-ray structure of N-(6-(4-bromo-3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazin-3-yl)benzamide. Chemical structures of [1,2,4]triazolo[4,3-b][1,2,4,5]tetrazine (a), [1,2,4

Anomeric 1,2,3-triazole-linked sialic acid derivatives show selective inhibition towards a bacterial neuraminidase over a trypanosome trans-sialidase

• Peterson de Andrade,
• Sanaz Ahmadipour and
• Robert A. Field

Beilstein J. Org. Chem. 2022, 18, 208–216, doi:10.3762/bjoc.18.24

• the deprotection step with CH3OH/triethylamine/H2O 4:1:5 [26], triethylammonium ions were exchanged upon treatment with Amberlite IR 120 (Na+ form) and compounds 3a–h were obtained in excellent yield and purity without further purification. Chemical structures and reported activities of viral (A

Glycosylated coumarins, flavonoids, lignans and phenylpropanoids from Wikstroemia nutans and their biological activities

• Meifang Wu,
• Xiangdong Su,
• Yichuang Wu,
• Yuanjing Luo,
• Ying Guo and
• Yongbo Xue

Beilstein J. Org. Chem. 2022, 18, 200–207, doi:10.3762/bjoc.18.23

• large quantity of phenolic substances found in plants and microorganisms [5]. These naturally occurring coumarins were well documented due to their diverse chemical structures and promising biological properties, such as anticancer, antitubercular, anti-inflammatory, anticoagulant, antibacterial, and

• ) at 35 °C with isocratic elution of 25% CH3CN in 0.1% H3PO4 for 40 min and subsequent washing of the column with 90% CH3CN at a flow rate 0.8 mL/min. Peaks at 16.54 and 19.64 min have coincided with derivatives of ᴅ-glucose and ᴅ-xylose [30]. Chemical structures of compounds 1–17 from W. nutans. The

Mechanistic studies of the solvolysis of alkanesulfonyl and arenesulfonyl halides

• Malcolm J. D’Souza and
• Dennis N. Kevill

Beilstein J. Org. Chem. 2022, 18, 120–132, doi:10.3762/bjoc.18.13

• values are from [56] and [62]. Organic reactions where the breaking of a C–X bond involves the formation of a high energy ion-pair intermediate. The chemical structures for the 1-adamantyl substrate, 2-adamantyl substrate, and the S-methyldibenzothiophenium ion (MeDBTh+). In the 1- and 2-substituted

Tenacibactins K–M, cytotoxic siderophores from a coral-associated gliding bacterium of the genus Tenacibaculum

• Yasuhiro Igarashi,
• Yiwei Ge,
• Tao Zhou,
• Amit Raj Sharma,
• Enjuro Harunari,
• Naoya Oku and
• Agus Trianto

Beilstein J. Org. Chem. 2022, 18, 110–119, doi:10.3762/bjoc.18.12

• 50275, Central Java, Indonesia 10.3762/bjoc.18.12 Abstract HPLC/DAD-based chemical investigation of a coral-associated gliding bacterium of the genus Tenacibaculum yielded three desferrioxamine-class siderophores, designated tenacibactins K (1), L (2), and M (3). Their chemical structures, comprising

Biological properties and conformational studies of amphiphilic Pd(II) and Ni(II) complexes bearing functionalized aroylaminocarbo-N-thioylpyrrolinate units

• Samet Poyraz,
• Samet Belveren,
• Sabriye Aydınoğlu,
• Mahmut Ulger,
• Abel de Cózar,
• Maria de Gracia Retamosa,
• Jose M. Sansano and
• H. Ali Döndaş

Beilstein J. Org. Chem. 2021, 17, 2812–2821, doi:10.3762/bjoc.17.192

• cellular targets known for antituberculosis drugs and all the different chemical structures (inhibition of cell wall synthesis, disruption of the plasma membrane, DNA-gyrase, etc.) the next work focused on determining the exact biological mechanism and docking studies could not be executed. Conclusion The

Adjusting the length of supramolecular polymer bottlebrushes by top-down approaches

• Tobias Klein,
• Franka V. Gruschwitz,
• Maren T. Kuchenbrod,
• Ivo Nischang,
• Stephanie Hoeppener and
• Johannes C. Brendel

Beilstein J. Org. Chem. 2021, 17, 2621–2628, doi:10.3762/bjoc.17.175

• obtain some control over the length distributions of 1D polymer nanostructures, and thus this makes them more likely to be applied in biomedicine, where dimensional control is a prerequisite. Schematic representation of the chemical structures of BTU and BTP and the supramolecular self-assembly of the

Synthesis and investigation on optical and electrochemical properties of 2,4-diaryl-9-chloro-5,6,7,8-tetrahydroacridines

• Najeh Tka,
• Mohamed Adnene Hadj Ayed,
• Mourad Ben Braiek,
• Mahjoub Jabli and
• Peter Langer

Beilstein J. Org. Chem. 2021, 17, 2450–2461, doi:10.3762/bjoc.17.162

• further study the electronic properties, DFT calculations were carried out on the fully ground state at the restricted B3LYPlevel with 6-31G(d) basis set using dichloromethane as a continuum solvent model. The optimized chemical structures of 4a–d are given in Figure 7 with selected geometrical parameters

Efficient synthesis of polyfunctionalized carbazoles and pyrrolo[3,4-c]carbazoles via domino Diels–Alder reaction

• Ren-Jie Fang,
• Chen Yan,
• Jing Sun,
• Ying Han and
• Chao-Guo Yan

Beilstein J. Org. Chem. 2021, 17, 2425–2432, doi:10.3762/bjoc.17.159

• chemical structures of the carbazoles were fully characterized by 1H NMR, 13C NMR, IR, and HRMS spectra. To explain the formation of the products, a plausible reaction mechanism was proposed in Scheme 2 on the basis of the previously reported reaction [48][53]. Firstly, the DDQ oxidative dehydrogenation of

Synthesis and antimicrobial activity of 1H-1,2,3-triazole and carboxylate analogues of metronidazole

• Satya Kumar Avula,
• Syed Raza Shah,
• Khdija Al-Hosni,
• Muhammad U. Anwar,
• Rene Csuk,
• Biswanath Das and
• Ahmed Al-Harrasi

Beilstein J. Org. Chem. 2021, 17, 2377–2384, doi:10.3762/bjoc.17.154

• , analogues 5b–i were obtained in 86–94% yield using the different alkyne derivatives 4b–i. The synthesis of the new 1H-1,2,3-triazole derivatives of metronidazole is summarized in Scheme 1 and Table 1. Their chemical structures (5a–i) were confirmed by spectroscopic techniques (1H NMR, 13C NMR) and HRMS. The

• synthesis of the new metronidazole carboxylate derivatives is summarized in Scheme 2 and Table 2. Their chemical structures (7a–e) were confirmed by spectroscopic techniques (1H NMR, 13C NMR and HRMS). The 1H NMR spectrum of compound 7b showed two doublet signals at δ 8.26 and 8.07 which are due to the four

• 1H-1,2,3-triazole moiety in the medicinal field. In addition, the above-mentioned activity of all the active compounds was reported for the first time for these derivatives. Structure of metronidazole (1). Chemical structures of some metronidazole derivatives with different biological activity

Phenolic constituents from twigs of Aleurites fordii and their biological activities

• Kyoung Jin Park,
• Won Se Suh,
• Da Hye Yoon,
• Chung Sub Kim,
• Sun Yeou Kim and
• Kang Ro Lee

Beilstein J. Org. Chem. 2021, 17, 2329–2339, doi:10.3762/bjoc.17.151

• nm with a microtiter plate reader. Etoposide (Sigma Chemical Co., ≥98%) was used as a positive control. Chemical structures of compounds 1–19. Key COSY and HMBC correlations of compounds 1–3, 15, and 16 and key NOESY correlation of 2. 1H and 13C NMR spectroscopic data of compounds 1–3 in CD3OD. 1H

Synthesis of O⁶-alkylated preQ₁ derivatives

• Laurin Flemmich,
• Sarah Moreno and
• Ronald Micura

Beilstein J. Org. Chem. 2021, 17, 2295–2301, doi:10.3762/bjoc.17.147

• )), 150.7 (C(4)), 120.0 (C(8)), 116.3 (q, JCF = 295.0 Hz, CF3COO−), 107.5 & 96.2 ((C(5) & C(7)), 53.7 (H3CO), 34.8 (CH2CC(7)) ppm; ESIMS (m/z): [M + H – NH3]+ calcd, 177.0771; found, 177.0767; [M + H]+ calcd, 194.1036; found, 194.1032. Chemical structures of queuine (Q base) and the hypermodified nucleoside

(Phenylamino)pyrimidine-1,2,3-triazole derivatives as analogs of imatinib: searching for novel compounds against chronic myeloid leukemia

• Luiz Claudio Ferreira Pimentel,
• Lucas Villas Boas Hoelz,
• Henayle Fernandes Canzian,
• Frederico Silva Castelo Branco,
• Andressa Paula de Oliveira,
• Vinicius Rangel Campos,
• Floriano Paes Silva Júnior,
• Rafael Ferreira Dantas,
• Jackson Antônio Lamounier Camargos Resende,
• Anna Claudia Cunha,
• Nubia Boechat and
• Mônica Macedo Bastos

Beilstein J. Org. Chem. 2021, 17, 2260–2269, doi:10.3762/bjoc.17.144

• chemical structures of the title compounds were confirmed by 1H and 13C NMR spectroscopic analyses and HRMS spectrometric analyses. X-ray data collection and structure refinement Single crystal X-ray data for 2b were collected on a Bruker D8 Venture diffractometer using graphite-monochromated Mo Kα

Progress and challenges in the synthesis of sequence controlled polysaccharides

• Giulio Fittolani,
• Theodore Tyrikos-Ergas,
• Denisa Vargová,
• Manishkumar A. Chaube and
• Martina Delbianco

Beilstein J. Org. Chem. 2021, 17, 1981–2025, doi:10.3762/bjoc.17.129

Volatile emission and biosynthesis in endophytic fungi colonizing black poplar leaves

• Christin Walther,
• Pamela Baumann,
• Katrin Luck,
• Beate Rothe,
• Peter H. W. Biedermann,
• Jonathan Gershenzon,
• Tobias G. Köllner and
• Sybille B. Unsicker

Beilstein J. Org. Chem. 2021, 17, 1698–1711, doi:10.3762/bjoc.17.118

• Ascomycota. Accession numbers Sequence data for CxTPS1 (MW331493) and CxTPS2 (MW331494) can be found in the NCBI GenBank [85] under the corresponding identifiers. Raw reads of the RNAseq experiment were deposited in the NCBI Sequence Read Archive under the BioProject accession PRJNA682522. Chemical

• structures of sesquiterpenes emitted from endophytic fungi (Table 2) isolated from black poplar leaves. Terpene synthase activity of CxTPS1 and CxTPS2. A) Genes were heterologously expressed in Escherichia coli and partially purified proteins were assayed with GPP, (E,E)-FPP, or (E,E,E)-GGPP as substrates in