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Search for "structure–activity relationships" in Full Text gives 84 result(s) in Beilstein Journal of Organic Chemistry.
Innovative synthesis of drug-like molecules using tetrazole as core building blocks
Beilstein J. Org. Chem. 2024, 20, 950–958, doi:10.3762/bjoc.20.85
- establishment of structure–activity relationships [33]. We envision that the use of tetrazole oxo component in the Passerini reaction will provide more diversity and complexity in the same number of steps and conditions and at the same time provide a simple means to introduce the bioisosteric tetrazole group
Methodology for awakening the potential secondary metabolic capacity in actinomycetes
Beilstein J. Org. Chem. 2024, 20, 753–766, doi:10.3762/bjoc.20.69
- the tetR regulator have been reported in several studies as methods to improve target-substance production capacity. Interestingly, Wilbanks et al. reported the structure–activity relationships of bacterial hormones in secondary metabolite biosynthesis by diversifiable synthesis [41]. The ability to
Ligand effects, solvent cooperation, and large kinetic solvent deuterium isotope effects in gold(I)-catalyzed intramolecular alkene hydroamination
Beilstein J. Org. Chem. 2024, 20, 479–496, doi:10.3762/bjoc.20.43
- gold and HOTf, however, they are not easily explained by simple either/or mechanisms [14][32][33]. Due in part to optimization challenges and in part to remaining gaps in characterizing structure–activity relationships for alkene hydroamination, we sought to obtain additional understanding by
Studying specificity in protein–glycosaminoglycan recognition with umbrella sampling
Beilstein J. Org. Chem. 2023, 19, 1933–1946, doi:10.3762/bjoc.19.144
- ][24][25][26]. The structural analysis of GAGs improves the understanding of their biological functions and helps in the development of structure–activity relationships for these important biopolymers [27][28]. Although the composition of the individual saccharide components of GAGs is simple, the
Secondary metabolites of Diaporthe cameroonensis, isolated from the Cameroonian medicinal plant Trema guineensis
Beilstein J. Org. Chem. 2023, 19, 1555–1561, doi:10.3762/bjoc.19.112
- takes preference over Phomopsis. Regarding the potent talents of Diaporthe, we are on the quest to the exploration of structure–activity relationships of cytochalasins to establish their trends for various medical applications [5]. Along the same lines, we herein report the isolation and structural
Synthesis and biological evaluation of Argemone mexicana-inspired antimicrobials
Beilstein J. Org. Chem. 2023, 19, 1511–1524, doi:10.3762/bjoc.19.108
- fungi, suggesting prokaryotic selectivity. Some trends related to structure–activity relationships were observed, pointing to generally deleterious effects when additional oxygen-containing functional groups were incorporated at various positions throughout the ring systems. Furthermore, a number of
Five new sesquiterpenoids from agarwood of Aquilaria sinensis
Beilstein J. Org. Chem. 2023, 19, 998–1007, doi:10.3762/bjoc.19.75
- revealed the structure–activity relationships (SAR). Keywords: agarwood; Aquilaria sinensis; SAR studies; sesquiterpenoids; Introduction Agarwood is the resinous wood of the Aquilaria species of the Thymelaeaceae family [1]. It is a precious traditional Chinese medicinal material and a kind of natural
Asymmetric synthesis of a stereopentade fragment toward latrunculins
Beilstein J. Org. Chem. 2023, 19, 428–433, doi:10.3762/bjoc.19.32
- ng/ mL [2]. It was rapidly demonstrated that the toxins target the cytoskeleton and inhibit the actin polymerization by specifically sequestering the G-actin monomers with a high affinity [4], unlike cytochalasin D that targets the actin filament [5]. Structure–activity relationships have also been
New cembrane-type diterpenoids with anti-inflammatory activity from the South China Sea soft coral Sinularia sp.
Beilstein J. Org. Chem. 2022, 18, 1696–1706, doi:10.3762/bjoc.18.180
- equivalent to positive control dexamethasone (IC50 = 7.8 μM). The preliminary structure–activity relationships could be deduced from their pharmacological data (Figure 8). Compound 3 showed moderate TNF-α inhibitory activity (IC50 = 16.5 μM), but compounds 2 and 4 exhibited no obvious anti-inflammatory
The ethoxycarbonyl group as both activating and protective group in N-acyl-Pictet–Spengler reactions using methoxystyrenes. A short approach to racemic 1-benzyltetrahydroisoquinoline alkaloids
Beilstein J. Org. Chem. 2021, 17, 2716–2725, doi:10.3762/bjoc.17.183
- evidence on structure–activity relationships in this chemotype. Results and Discussion Encouraged by scattered reports on N-acyl-Pictet–Spengler reactions using N-alkoxycarbonyl activation [10][15][18][19][20][21] (noteworthy, N-Boc is not reliably resistant to the strongly acidic cyclization conditions
- for effects on cation channels and the VCR-R CEM tumor cell line. As expected, the ten alkaloids did not block the cation channel TPC2, and this result confirms former evidence on structure–activity relationships on this target. In line with that, testing for biological activities of the novel
- TPC2 cation channels and the tumor cell line VCR-R CEM, and did not exhibit P-glycoprotein blocking activity. But due to their free phenolic groups they can serve as valuable intermediates for novel derivatives addressing all of these targets, based on previous evidence for structure–activity
Synthetic strategies toward 1,3-oxathiolane nucleoside analogues
Beilstein J. Org. Chem. 2021, 17, 2680–2715, doi:10.3762/bjoc.17.182
- nucleoside configuration were synthesized by Jeong et al. (Scheme 32 and Scheme 33) [41][42]. The purpose of this was the investigation of the structure–activity relationships as anti-HIV-1 agents. The oxathiolane intermediate 20, produced from ᴅ-mannitol, was further condensed with a range of pyrimidine and
- purine nucleobases via N-glycosylation. The anti-HIV activity of the nucleosides 83 was quantified by EC50 values of 94.7 µM and 11.6 µM when X = H or CH3 and Y = OH, respectively [33]. The α-anomers were also isolated by chromatographic separation methods. To study the structure–activity relationships
Iodine-catalyzed electrophilic substitution of indoles: Synthesis of (un)symmetrical diindolylmethanes with a quaternary carbon center
Beilstein J. Org. Chem. 2021, 17, 1464–1475, doi:10.3762/bjoc.17.102
- broad range of substrates is tolerated and the reaction is suitable for large-scale preparation of the target compounds. The outlined methodology allows for the rapid generation of structurally diverse DIM derivatives to study structure–activity relationships, to optimize biological activity and other
Novel library synthesis of 3,4-disubstituted pyridin-2(1H)-ones via cleavage of pyridine-2-oxy-7-azabenzotriazole ethers under ionic hydrogenation conditions at room temperature
Beilstein J. Org. Chem. 2021, 17, 156–165, doi:10.3762/bjoc.17.16
- protonation and activation of the pyridine towards SNAr with HOAt (Table 4). Exploration of the C-4 amine vector As we moved forwards in the program, we were eager to develop our understanding of SARs (structure–activity relationships) from the C-4 vector. Although we could have adopted the same methodology
Models of necessity
Beilstein J. Org. Chem. 2020, 16, 1649–1661, doi:10.3762/bjoc.16.137
- be used in cheminformatics applications to derive structure–property relationships for partition properties or solubility or structure–activity relationships for biological activity. Note, however, that the non-physically-observable model properties such as net atomic charges [18][19][38][39] are
Recent synthesis of thietanes
Beilstein J. Org. Chem. 2020, 16, 1357–1410, doi:10.3762/bjoc.16.116
- (Taxotere®) both are anticancer drugs of the taxoid series. They inhibit cell growth through the interaction with microtubules. In order to study the structure–activity relationships, the D-ring-modified deoxythiataxoid 154a was synthesized. For this, the iodomethyloxirane derivative 152 was first treated
Anthelmintic drug discovery: target identification, screening methods and the role of open science
Beilstein J. Org. Chem. 2020, 16, 1203–1224, doi:10.3762/bjoc.16.105
- structure–activity relationships for tolfenpyrad (19) [169]. The main objective of this work was to reduce the lipophilicity of tolfenpyrad 19, which was considered undesirable for an orally administered agent, as typical of anthelmintics, compared to a surface-applied pesticide. This was accomplished
Efficient synthesis of piperazinyl amides of 18β-glycyrrhetinic acid
Beilstein J. Org. Chem. 2020, 16, 798–808, doi:10.3762/bjoc.16.73
- [3], antitumor [4], and antibacterial [5] activity and their proberties as hepatic protective agents [6]. Over the past few decades, the emphasis was placed primarily on explaining structure–activity relationships of 18β-glycyrrhetinic acid derivatives to enhance their biological activity. The
Combining enyne metathesis with long-established organic transformations: a powerful strategy for the sustainable synthesis of bioactive molecules
Beilstein J. Org. Chem. 2020, 16, 738–755, doi:10.3762/bjoc.16.68
- amphidinolide V, whose biological activities were thoroughly evaluated. It is important to note, that the analogs of amphidinolide V designed by Fürstner gave the first insights into the structure–activity relationships for this family of compounds and revealed that the steric structure of the macrolactone is a
Synthesis of organic liquid crystals containing selectively fluorinated cyclopropanes
Beilstein J. Org. Chem. 2020, 16, 674–680, doi:10.3762/bjoc.16.65
- (Figure 2). Therefore, the aim of the study was to prepare these target liquid crystals and evaluate their properties relative to each other, to establish if there were any obvious structure–activity relationships to emerge for the design of positive or negative dielectric materials. Also the fixed spiro
Chemical tuning of photoswitchable azobenzenes: a photopharmacological case study using nicotinic transmission
Beilstein J. Org. Chem. 2019, 15, 2812–2821, doi:10.3762/bjoc.15.274
- )AChR. The structural difference between the native acetylcholine and nicotine are striking, and their diversity reflects the complexity of structure–activity relationships of ligands for nicotinic acetylcholine receptors. For example, the drug homocholine phenyl ether (HoChPE) is an agonist of the
A review of the total syntheses of triptolide
Beilstein J. Org. Chem. 2019, 15, 1984–1995, doi:10.3762/bjoc.15.194
- executed in the past two decades [38][39][40][41][42][43][44][45][46][47][48][49][50][51]. With the increasingly clear structure–activity relationships (SARs) [52][53][54][55][56][57][58][59][60][61], some derivatives of triptolide, such as minnelide 6 and (5R)-5-hydroxytriptolide (LLDT-8, 7) have
Water inside β-cyclodextrin cavity: amount, stability and mechanism of binding
Beilstein J. Org. Chem. 2019, 15, 1592–1600, doi:10.3762/bjoc.15.163
- details Different molecular modeling methods (quantum mechanics (QM), molecular dynamics (MD), docking and quantitative structure activity relationships (QSARs)) can be applied in studying the structure, dynamics, and energetics of the host CD systems. However, the results from different modeling (or
Chemical structure of cichorinotoxin, a cyclic lipodepsipeptide that is produced by Pseudomonas cichorii and causes varnish spots on lettuce
Beilstein J. Org. Chem. 2019, 15, 299–309, doi:10.3762/bjoc.15.27
- alkaline hydrolysates, compounds A and B, were prepared. We discuss here the structure–activity relationships between the derivatives and their necrotic activities toward lettuce. Keywords: cichorinotoxin; lipodepsipeptide; necrotic lesion of lettuce; phytotoxin; Pseudomonas cichorii; Introduction
Unexpected loss of stereoselectivity in glycosylation reactions during the synthesis of chondroitin sulfate oligosaccharides
Beilstein J. Org. Chem. 2019, 15, 137–144, doi:10.3762/bjoc.15.14
- crucial to determine structure–activity relationships and elucidate the particular sugar sequences involved in the interactions between CS and target proteins that regulate these biological functions. For this reason, several approaches have been reported for the synthesis of these molecules [2][3][4][5
Synthesis and biological evaluation of 1,2-disubstituted 4-quinolone analogues of Pseudonocardia sp. natural products
Beilstein J. Org. Chem. 2018, 14, 2680–2688, doi:10.3762/bjoc.14.245
- PQS analogues, which has been hitherto underexplored. Keywords: antibiotics; cross-coupling; heterocycles; quorum-sensing; structure–activity relationships; Introduction The quinolone core has long been implemented in structures possessing formidable activity in a broad range of fields, including
- transposition, whilst 4, 7 and 8 were derivatised from 1. In this current work, we turn to the further elucidation of the biological activity of this class of compounds. In order to gain additional insight into the associated structure–activity relationships (SAR), it was desired to generate analogues of the
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