Search results
Search for "antiproliferative" in Full Text gives 109 result(s) in Beilstein Journal of Organic Chemistry.
A review of the total syntheses of triptolide
Beilstein J. Org. Chem. 2019, 15, 1984–1995, doi:10.3762/bjoc.15.194
- [2][3][4], such as antiproliferative, antifertility [5], anti-osteoporosis [6], immunosuppressive and anti-inflammatory activities [7]. Reports have indicated that triptolide induces apoptosis, triggers autophagy [8], and arrests cell cycle progression through modulating the relevant signaling
Doebner-type pyrazolopyridine carboxylic acids in an Ugi four-component reaction
Beilstein J. Org. Chem. 2019, 15, 1281–1288, doi:10.3762/bjoc.15.126
- biological actions: antiproliferative [6][7][8][9], antimicrobial [10][11], anxiolytic [12], analgesic [13], hypnotic [13], antiviral [13], anti-HIV [13] activities, etc. Soural et al. [14] explored different data and showed the relevance of compounds composed of two or more heterocyclic rings for drug
- Plasmodium falciparum 3D7 strain [17]; antagonists of p53-Mdm2 interaction [18]; antiproliferative activity in the human solid tumor cell lines A549 (lung), HBL-100 (breast), HeLa (cervix), SW1573 (lung), T-47D (breast), and WiDr(colon) [19]; cyclophilin A inhibitory activity for the treatment of hepatitis C
Steroid diversification by multicomponent reactions
Beilstein J. Org. Chem. 2019, 15, 1236–1256, doi:10.3762/bjoc.15.121
- components, keeping formaldehyde as oxo component to obtain a single stereoisomer. The library was also integrated by the Ugi-4CR products derived from the 6β-ecdystereoidal amine (also used as precursor of isocyanide 28), while all compounds were evaluated as antiproliferative agents against T-leukemia cell
Multicomponent reactions (MCRs): a useful access to the synthesis of benzo-fused γ-lactams
Beilstein J. Org. Chem. 2019, 15, 1065–1085, doi:10.3762/bjoc.15.104
- derivatives show a large variety of biological activities [21][22][23], such as COX-2 inhibition [24], glucokinase activation [25], sodium channel blocking [26], antimycobacterial [27], antiproliferative [28] or carbonic anhydrase inhibition [29], as well as antifungal and antibacterial properties [30
Synthesis of 2H-furo[2,3-c]pyrazole ring systems through silver(I) ion-mediated ring-closure reaction
Beilstein J. Org. Chem. 2019, 15, 679–684, doi:10.3762/bjoc.15.62
- , the dihydro-1H-furo[2,3-c]pyrazole system, consisting of an aromatic pyrazole ring fused with a five-membered 2,3-dihydrofuran ring, was formed [8]. Derivatives of the latter system are known for their antimicrobial [9] and antiproliferative activities [10]. Nevertheless, methods to access 2H-furo[2,3
Synthesis of a tubugi-1-toxin conjugate by a modulizable disulfide linker system with a neuropeptide Y analogue showing selectivity for hY1R-overexpressing tumor cells
Beilstein J. Org. Chem. 2019, 15, 96–105, doi:10.3762/bjoc.15.11
- shown in Table 1. Furthermore, the PC-3 cells were indeed detected to be the most sensitive cell line compared to HT-29 and Colo320, since PC-3 probably expresses a higher NPY Y1 receptor level and internalizes, consequently, more peptide–toxin conjugate. The antiproliferative activities of the
Microwave-assisted synthesis of biologically relevant steroidal 17-exo-pyrazol-5'-ones from a norpregnene precursor by a side-chain elongation/heterocyclization sequence
Beilstein J. Org. Chem. 2018, 14, 2589–2596, doi:10.3762/bjoc.14.236
- liberation of the arylhydrazines from their hydrochloride salts in EtOH in the presence of NaOAc. The reaction rates were found to depend on the electronic character of the substituent present in the phenylhydrazine applied. The antiproliferative activities of the structurally related steroidal pyrazol-5
- the reference compound, cisplatin. Keywords: antiproliferative activity; Knorr reaction; microwave; pyrazol-5-ones; steroids; Introduction 17-exo-Heterocyclic androstanes with five or six-membered heterocyclic rings connected directly to C-17 of the sterane core represent a remarkable subclass of
- core, using both conventional heating and MW irradiation. The reaction conditions were optimized in order to improve the yields of the desired products and the influences of substituents of the hydrazine reagents investigated. The in vitro antiproliferative activities of the synthesized compounds were
Comparative cell biological study of in vitro antitumor and antimetastatic activity on melanoma cells of GnRH-III-containing conjugates modified with short-chain fatty acids
Beilstein J. Org. Chem. 2018, 14, 2495–2509, doi:10.3762/bjoc.14.226
- synthetic derivatives have been reported to exert an antiproliferative effect in different types of tumors related (e.g., breast, endometrial cancer [5]) and unrelated (e.g., melanoma, colon carcinoma [6][7]) to reproductive organs. Considering these aspects, the GnRH could serve as a targeting unit with
- of GnRH, could display strong antiproliferative effects in the breast, prostate, colon carcinoma cell lines, whereas induce 500–1000 times less LH-release than GnRH-I derivatives [14]. In our previous studies, the side chain of Lys8 was used for attachment of daunorubicin (Dau) via a more stable
- antiproliferative/cytotoxic activities, the cell adhesion and migration modulator effects of conjugates and their ability to induce apoptosis or cell cycle arrest in A2058 melanoma cell line. Results and Discussion Synthesis of Dau–GnRH-III conjugates The modified GnRH-III derivatives were prepared by solid phase
Investigation of the electrophilic reactivity of the biologically active marine sesquiterpenoid onchidal and model compounds
Beilstein J. Org. Chem. 2018, 14, 2229–2235, doi:10.3762/bjoc.14.197
- green alga Caulerpa taxifolia, exhibits antiproliferative activities as well as wound healing abilities with the latter resulting from rapid transformation to the highly reactive 1,4-dialdehyde, oxytoxin 2 (4) [4][5][6]. Oxytoxin 2 (4) is itself a natural product, produced by the mollusc Oxynoe olivacea
Drug targeting to decrease cardiotoxicity – determination of the cytotoxic effect of GnRH-based conjugates containing doxorubicin, daunorubicin and methotrexate on human cardiomyocytes and endothelial cells
Beilstein J. Org. Chem. 2018, 14, 1583–1594, doi:10.3762/bjoc.14.136
- . Small peptides that recognize target receptors on tumor cells might be suitable targeting moieties for this purpose. Hormone peptides, in particular, GnRH and somatostatin derivatives that possess antiproliferative effect on their own, are among the best candidates as homing peptides [10]. A.V. Schally
An overview of recent advances in duplex DNA recognition by small molecules
Beilstein J. Org. Chem. 2018, 14, 1051–1086, doi:10.3762/bjoc.14.93
- the past few years. Keywords: alkylators; antibiotic; anticancer; antineoplastic; antiproliferative; DNA recognition; groove binders; hairpin polyamides; Hoechst 33258; intercalators; Review 1. Introduction DNA is one of the central components of cellular machinery and storage unit of genetic
- . Szerszenowicz et al. developed a new set of potential minor groove binders derived from netropsin and bis-netropsin analogs by replacing N-methylpyrrole rings with other heterocyclic rings and their antiproliferative activity was tested on MCF-7 breast cancer cells [60]. Suckling et al. recently designed and
- evaluated their antiproliferative activity as well as their DNA binding affinity [98]. It has been confirmed that the most active conjugates are unsymmetrical triaryl benzamides 35 and 36 comprising of a bulky and alkylating chlorobenzylic substituent, respectively, and a polar amino side chain. Conjugate
The first Pd-catalyzed Buchwald–Hartwig aminations at C-2 or C-4 in the estrone series
Beilstein J. Org. Chem. 2018, 14, 998–1003, doi:10.3762/bjoc.14.85
- estrogen receptors (ERα and ERβ) [28]. Certain derivatives of 2- or 4-aminoestrone or their 3-methyl ether possess diverse biological activities, including enzyme inhibitory or antiproliferative properties [1][2][3][29][30]. The 17β-HSD1 enzyme is responsible for the reduction of estrone into 17β-estradiol
On the design principles of peptide–drug conjugates for targeted drug delivery to the malignant tumor site
Beilstein J. Org. Chem. 2018, 14, 930–954, doi:10.3762/bjoc.14.80
- . Another natural isoform of GnRH is GnRH-III (pGlu-His-Trp-Ser-His-Asp-Trp-Lys-Pro-Gly-NH2), which has been isolated from sea lamprey. GnRH-III binds to GnRH-R overexpressed on the cancer cell surface, resulting in an antiproliferative effect but seems to be less potent than the rest GnRH analogs regarding
Synthesis and in vitro biochemical evaluation of oxime bond-linked daunorubicin–GnRH-III conjugates developed for targeted drug delivery
Beilstein J. Org. Chem. 2018, 14, 756–771, doi:10.3762/bjoc.14.64
- antiproliferative activity. Furthermore, the absence of the free ε-amino group additionally reduced the endocrine effect [23][24]. Thus, the 8Lys can be utilized as conjugation site for cytotoxic agents like anthracyclines. In the past decade, a variety of different linkage systems has been carried out including
- receptor binding affinity and an enhanced antiproliferative activity without substantial effect on the endocrine activity [31][32][33], we developed six novel GnRH-III–Dau conjugates in which the 6Asp was replaced by D-Aaa. Here we report on the synthesis of GnRH-III bioconjugates containing D-Asp, D-Glu
- of the antiproliferative activity between the 4Ser and the corresponding 4Lys(Bu) derivatives could be observed which is not in line with our previous data [29]. This might be a result of the prolonged incubation time which was modified from 6 hours up to 24 hours because of the decreased antitumor
Synthesis and biological evaluation of RGD and isoDGR peptidomimetic-α-amanitin conjugates for tumor-targeting
Beilstein J. Org. Chem. 2018, 14, 407–415, doi:10.3762/bjoc.14.29
- antiproliferative activity of the conjugates was evaluated in three cell lines possessing different levels of αVβ3 integrin expression: human glioblastoma U87 (αVβ3+), human lung carcinoma A549 (αVβ3−) and breast adenocarcinoma MDA-MB-468 (αVβ3−). In the U87, in the MDA-MB-468, and partly in the A549 cancer cell
- , cyclo[DKP-RGD]-Val-Ala-PTX 5 and cyclo[DKP-isoDGR]-Val-Ala-PTX 6). Their tumor targeting ability was assessed in vitro in antiproliferative assays comparing an αVβ3 positive with an αVβ3 negative cell line [29][30]. The cyclo[DKP-isoDGR]-Val-Ala-PTX conjugate 6 displayed a remarkable targeting index (TI
- αVβ3 expressing tumor cells. Cell viability assays The antiproliferative activity of the conjugates was evaluated in three cell lines expressing different levels of αVβ3 integrin. U87 cells (human glioblastoma) were selected as αVβ3 positive, while A549 cells (human lung carcinoma) and MDA-MB-468
Recent developments in the asymmetric Reformatsky-type reaction
Beilstein J. Org. Chem. 2018, 14, 325–344, doi:10.3762/bjoc.14.21
- actually 30-epiapratoxin E, thus correcting the originally proposed absolute configuration. Both diastereomers were tested for their antiproliferative activities in HCT116 cells, showing that natural (30R)-apratoxin E exhibited a higher activity than its (30S)-epimer. Due to their lower basicity, samarium
- constituted the key step of a nine-step total synthesis of the eastern fragment of jatrophane diterpene Pl-3, which is a complex natural product with high promising biological activities, such as antiproliferative activity and inhibition of the efflux-pump activity of multidrug resistance P-glycoprotein. The
- under mild and neutral conditions. Among them, many syntheses of naturally occurring products have been described for the first time, such as those of the glucose-regulated protein 78 expression inhibitor agent prunustatin A, the antiproliferative agent apratoxin E and its C30 epimer, prebiscibactin
The chemistry and biology of mycolactones
Beilstein J. Org. Chem. 2017, 13, 1596–1660, doi:10.3762/bjoc.13.159
Synthesis of novel 13α-estrone derivatives by Sonogashira coupling as potential 17β-HSD1 inhibitors
Beilstein J. Org. Chem. 2017, 13, 1303–1309, doi:10.3762/bjoc.13.126
- bearing promising biological activities. We recently published the syntheses and the in vitro biological evaluations of several 13α-estrone derivatives [6][7][8][9]. Certain compounds proved to be biologically active, bearing substantial antiproliferative or enzyme inhibitory potential [7][8]. Most
Synthesis of spiro[isoindole-1,5’-isoxazolidin]-3(2H)-ones as potential inhibitors of the MDM2-p53 interaction
Beilstein J. Org. Chem. 2016, 12, 2793–2807, doi:10.3762/bjoc.12.278
- -benzylnitrone with isoindolin-3-methylene-1-ones. The regio- and stereoselectivity of the process have been rationalized by computational methods. The obtained compounds show cytotoxic properties and antiproliferative activity in the range of 9–22 μM. Biological tests suggest that the antitumor activity could
- have resulted in the identification of a number of potential MDM2-p53 interaction inhibitors. Biological tests confirm our initial hypothesis indicating for compounds 3 an antiproliferative activity in the range of 9–22 μM: the antitumor activity appears to be linked to the inhibition of the protein
- have been performed using 6e as model compound. In general, all the synthesized compounds showed a certain degree of antiproliferative effect against all the examined cancer cells with a similar trend (see Supporting Information File 1, Figure S1). Noteworthy, compound 6e exhibited superior activity
Marine-derived myxobacteria of the suborder Nannocystineae: An underexplored source of structurally intriguing and biologically active metabolites
Beilstein J. Org. Chem. 2016, 12, 969–984, doi:10.3762/bjoc.12.96
- of compounds that have recently been shown to have antiproliferative effects on leukemic K-562 cells [27]. Halotolerant and halophilic marine myxobacteria are poorly investigated regarding secondary metabolite production. Therefore, the pool of secondary metabolites isolated from organisms of this
- . Only recently it was recognized that members of this genus have a great potential as producers of metabolites with relevant biological activities. One striking example is the 2015 described nannocystin A (10, Figure 6), a macrocyclic compound of NRPS-PKS origin with strong antiproliferative properties
Synthesis and in vitro cytotoxicity of acetylated 3-fluoro, 4-fluoro and 3,4-difluoro analogs of D-glucosamine and D-galactosamine
Beilstein J. Org. Chem. 2016, 12, 750–759, doi:10.3762/bjoc.12.75
- galectin-mediated antitumor T cell apoptosis [16]. Some acetylated fluoro hexosamines also displayed antiproliferative properties in vitro [17]. For example, 3- and 4-fluoro-D-glucosamine analogs 5 [18] and 1 [19], and 4-fluoro-D-galactosamine analog 4 [19] (Figure 1), inhibited the growth of murine L1210
- 2) [2]. The remarkable ability of acetylated fluoro analogs of GlcNAc and GalNAc to perturb the (glycosamino)glycan biosynthesis and their antiproliferative properties aroused our interest in developing a methodology for the preparation of a complete series of acetylated 3-fluoro, 4-fluoro-, and 3,4
- -HexNAc [19], and 4,6-difluoro-D-GalNAc [19] were reported to exhibit antiproliferative properties against L1210 leukemia cells in micromolar concentrations (IC50 24–43 μM). It was found that O-deacetylated amino sugars were often inactive due to low lipophilicity and poor cellular uptake [19]. Compound 5
Three new trixane glycosides obtained from the leaves of Jungia sellowii Less. using centrifugal partition chromatography
Beilstein J. Org. Chem. 2016, 12, 674–683, doi:10.3762/bjoc.12.68
- amastigotes with an IC50 value of 100 μg/mL. Except for compound 1 that exhibited a weak antileishmanial activity at 50 μM (20%) against L. amazonensis intracellular amastigotes, none of the other sesquiterpenes displayed antiparasitic activity. Compounds 1–3 showed less than 50% antiproliferative effect on
Unconventional application of the Mitsunobu reaction: Selective flavonolignan dehydration yielding hydnocarpins
Beilstein J. Org. Chem. 2016, 12, 662–669, doi:10.3762/bjoc.12.66
- multiple biological activities and promising therapeutic applications, such as hepatoprotection, antitumor, antiproliferative and anti-oxidant properties [1]. The standardized extract of S. marianum fruits contains the so-called silymarin complex, and is used as the main active component mixture of Legalon
The aminoindanol core as a key scaffold in bifunctional organocatalysts
Beilstein J. Org. Chem. 2016, 12, 505–523, doi:10.3762/bjoc.12.50
- work, an efficient enantioselective and sequential double Friedel–Crafts alkylation provided direct access to the tetracyclic seven-membered ring containing indoles 8. These pharmaceutically intriguing compounds exhibit anticancer [27] and antiproliferative activity [28]. In the first catalytic cycle
Copper-mediated arylation with arylboronic acids: Facile and modular synthesis of triarylmethanes
Beilstein J. Org. Chem. 2016, 12, 496–504, doi:10.3762/bjoc.12.49
- binding affinity [21], inhibition of hepatic cholesterol [22], inhibition of aldose reductase [23], antiproliferative [24], antiviral, cytotoxic [25], antifungal [26], anti-HIV [27][28][29] and antibacterial activity [30]. Although rare, there are a few natural products, for example, melanervin (5), a
Other Beilstein-Institut Open Science Activities
