Formaldehyde surrogates in multicomponent reactions

• Cecilia I. Attorresi,
• Javier A. Ramírez and
• Bernhard Westermann

Beilstein J. Org. Chem. 2025, 21, 564–595, doi:10.3762/bjoc.21.45

N-Glycosides of indigo, indirubin, and isoindigo: blue, red, and yellow sugars and their cancerostatic activity

• Peter Langer

Beilstein J. Org. Chem. 2024, 20, 2840–2869, doi:10.3762/bjoc.20.240

• substituent. The carbohydrate moiety also has an influence on the antiproliferative activity. The best activities were observed for rhamnosides, while the lowest activity was observed for galactoside β-20a. The configuration of the anomeric carbon atom of the rhamnoside did not show a major influence as very

• collaboration with Manfred Kunz (University of Leipzig), it was shown that all four compounds exhibit excellent antiproliferative activity against the malignant melanoma cell lines MeI-19, SK-MeI-29, SK-MeI-103, and SK-MeI-147. The compounds also induce apoptosis of the cancer cell lines which was investigated

• collaboration with Jürgen Eberle and his team it was shown that selenoindirubin-N-glycosides β-38a–h showed antiproliferative activity against lung cancer cell lines H157 [38]. The antiproliferative activity against melanoma cells was accompanied by induced apoptosis in combination with the death ligand TRAIL

Synthesis, electrochemical properties, and antioxidant activity of sterically hindered catechols with 1,3,4-oxadiazole, 1,2,4-triazole, thiazole or pyridine fragments

• Daria A. Burmistrova,
• Andrey Galustyan,
• Nadezhda P. Pomortseva,
• Kristina D. Pashaeva,
• Maxim V. Arsenyev,
• Oleg P. Demidov,
• Mikhail A. Kiskin,
• Andrey I. Poddel’sky,
• Nadezhda T. Berberova and
• Ivan V. Smolyaninov

Beilstein J. Org. Chem. 2024, 20, 2378–2391, doi:10.3762/bjoc.20.202

• properties [28]. Anti-tuberculosis activity was identified for 5-substituted 2-mercapto-1,3,4-oxadiazoles [29], 5-substituted-2-[(3,5-dinitrobenzyl)-sulfanyl]-1,3,4-oxadiazoles and 1,3,4-thiadiazoles [30]. Some derivatives of 5-(4-tert-butylphenyl)-1,3,4-oxadiazole-2(3H)-thione showed antiproliferative

• activity against the HeLa cancer cell line [22]. 1,2,4-Triazole thioglycoside derivatives have antiviral activity against influenza strains H3N2 and H5N1 [31][32]. The 1,2,4-triazole-3-thione-imidazole hybrids displayed potential antibacterial activity against E. coli, S. aureus [33]. Heterocyclic thione

The Groebke–Blackburn–Bienaymé reaction in its maturity: innovation and improvements since its 21st birthday (2019–2023)

• Cristina Martini,
• Muhammad Idham Darussalam Mardjan and
• Andrea Basso

Beilstein J. Org. Chem. 2024, 20, 1839–1879, doi:10.3762/bjoc.20.162

Syntheses and medicinal chemistry of spiro heterocyclic steroids

• Laura L. Romero-Hernández,
• Ana Isabel Ahuja-Casarín,
• Penélope Merino-Montiel,
• Sara Montiel-Smith,
• José Luis Vega-Báez and
• Jesús Sandoval-Ramírez

Beilstein J. Org. Chem. 2024, 20, 1713–1745, doi:10.3762/bjoc.20.152

• promoted by mercury(II) oxide, yielding spiro 2-substituted amino-4,5-dihydro-1,3-oxazoles 72a,b in moderate to good yields (Scheme 21). All spiro derivatives exhibited potent antiproliferative activity when tested on six human cancer cell lines (GI50 = 0.34–18 µM). Structure–activity relationships

• quantities of diastereomers 75, derived from β-side attack, were also observed. Subsequently, spiroisoxazolines 74 and 75 were assessed for their antiproliferative activity in three malignant human cell lines (HeLa, MCF7, and A431). The data revealed that the aryl compounds 74 exhibited greater potency

• antiproliferative activity when tested against a panel of different tumorous cells (GI50 = 2.0–11 μM). Docking simulations revealed that spiromorpholinone 149 could act as an aromatase inhibitor [63]. Spirotriazine steroids Bakhotmah and Abdel-Rahman developed steroidal spiropyrazolotriazine derivatives 152–154

The Ugi4CR as effective tool to access promising anticancer isatin-based α-acetamide carboxamide oxindole hybrids

• Carolina S. Marques,
• Aday González-Bakker and
• José M. Padrón

Beilstein J. Org. Chem. 2024, 20, 1213–1220, doi:10.3762/bjoc.20.104

• , aliphatic chain on the acid component and small aliphatic chain on the aldehyde component to increase the antiproliferative activity. Also, benzyl isocyanide was favored over the aliphatic one (Scheme 1A) [16]. Considering the value of amide groups in drug discovery [19], the feasibility of running the

• . Compounds 5ib and 5hb, with N-Boc protected-heterocycle units in the 5-amide position of the oxindole ring (Scheme 2) failed to afford the corresponding 3-deprotected isatin hybrids, since only decomposition byproducts (not identified) were obtained. Antiproliferative activity Considering the potential

• antiproliferative activity of these compounds, we screened 14 α-acetamide carboxamide isatin hybrids against six human solid tumor cell lines. The panel of cell lines comprised non-small cell lung carcinoma A549 and SW1573, cervical adenocarcinoma HeLa, breast cancer HBL-100 and T-47D, and colon adenocarcinoma WiDr

Effects of the aldehyde-derived ring substituent on the properties of two new bioinspired trimethoxybenzoylhydrazones: methyl vs nitro groups

• Dayanne Martins,
• Roberta Lamosa,
• Talis Uelisson da Silva,
• Carolina B. P. Ligiero,
• Sérgio de Paula Machado,
• Daphne S. Cukierman and
• Nicolás A. Rey

Beilstein J. Org. Chem. 2023, 19, 1713–1727, doi:10.3762/bjoc.19.125

• thus less side-effects in therapy [23]. In this sense, we have reported dicopper(II) complexes from different N-acylhydrazonic binucleating ligands with potent antiproliferative activity against a panel of cancer cell lines [24][25][26]. On the field of neurodegeneration, our research group was the

Synthesis of ether lipids: natural compounds and analogues

• Marco Antônio G. B. Gomes,
• Alicia Bauduin,
• Chloé Le Roux,
• Romain Fouinneteau,
• Wilfried Berthe,
• Mathieu Berchel,
• Hélène Couthon and
• Paul-Alain Jaffrès

Beilstein J. Org. Chem. 2023, 19, 1299–1369, doi:10.3762/bjoc.19.96

Synthesis of imidazo[4,5-e][1,3]thiazino[2,3-c][1,2,4]triazines via a base-induced rearrangement of functionalized imidazo[4,5-e]thiazolo[2,3-c][1,2,4]triazines

• Dmitry B. Vinogradov,
• Alexei N. Izmest’ev,
• Angelina N. Kravchenko,
• Yuri A. Strelenko and
• Galina A. Gazieva

Beilstein J. Org. Chem. 2023, 19, 1047–1054, doi:10.3762/bjoc.19.80

• synthetic bioactive 1,3-thiazine and imidazothiazolotriazine derivatives with high antiproliferative activity. 1H NMR spectra of the starting compound 1d (a) and the reaction mixture after 1.5 (b) and 4 (c) hours in DMSO-d6 (the colored signals correspond to the protons shown in red in Scheme 4). 1H NMR

Combretastatins D series and analogues: from isolation, synthetic challenges and biological activities

• Jorge de Lima Neto and
• Paulo Henrique Menezes

Beilstein J. Org. Chem. 2023, 19, 399–427, doi:10.3762/bjoc.19.31

• μM) [54]. O-Methylcombretastatin D-2, 28 was also evaluated for its antiproliferative activity against MCF-7 human breast carcinoma, RKO human colon carcinoma, and CRL 1730 human umbilical endothelial cells. It exhibited activity in all cell lines with IC50 values around 5–10 mM [50]. Aiming to

An accelerated Rauhut–Currier dimerization enabled the synthesis of (±)-incarvilleatone and anticancer studies

• Tharun K. Kotammagari,
• Sweta Misra,
• Sayantan Paul,
• Sunita Kunte,
• Rajesh G. Gonnade,
• Manas K. Santra and
• Asish K. Bhattacharya

Beilstein J. Org. Chem. 2023, 19, 204–211, doi:10.3762/bjoc.19.19

• -rengyolone (3) by using KHMDS as a base. The antiproliferative activity of these compounds was tested using MTT assays and the results revealed that these compounds are less efficient in inhibiting the growth of breast cancer cells. Structures of (±)-incarvilleatone (1), (±)-incarviditone (2), and

Insight into oral amphiphilic cyclodextrin nanoparticles for colorectal cancer: comprehensive mathematical model of drug release kinetic studies and antitumoral efficacy in 3D spheroid colon tumors

• Sedat Ünal,
• Gamze Varan,
• Juan M. Benito,
• Yeşim Aktaş and
• Erem Bilensoy

Beilstein J. Org. Chem. 2023, 19, 139–157, doi:10.3762/bjoc.19.14

• ]. In both traditional and 3D cell culture investigations, incubating cells with empty CD nanoparticles and drug solutions has a synergistic impact due to the antiproliferative activity of the CD nanoparticles themselves. Co-administration of pharmaceuticals with empty nanoparticles, as well as

Synthesis of novel alkynyl imidazopyridinyl selenides: copper-catalyzed tandem selenation of selenium with 2-arylimidazo[1,2-a]pyridines and terminal alkynes

• Mio Matsumura,
• Kaho Tsukada,
• Kiwa Sugimoto,
• Yuki Murata and
• Shuji Yasuike

Beilstein J. Org. Chem. 2022, 18, 863–871, doi:10.3762/bjoc.18.87

• -alkynylselenides III exhibits a binding interaction between calf-thymus DNA and human serum albumin [13]. Moreover, imidazopyridine derivatives IV with selanyl groups, 3-aryl- or alkylselanylimidazo[1,2-a]pyridines, were reported to act as potential antioxidants and showed antiproliferative activity [14][15

Highly stereocontrolled total synthesis of racemic codonopsinol B through isoxazolidine-4,5-diol vinylation

• Lukáš Ďurina,
• Anna Ďurinová,
• František Trejtnar,
• Ľuboš Janotka,
• Lucia Messingerová,
• Jana Doháňošová,
• Ján Moncol and
• Róbert Fischer

Beilstein J. Org. Chem. 2021, 17, 2781–2786, doi:10.3762/bjoc.17.188

• (±)-Codonopsinol B (1) and its N-nor-methyl analogue 2 were evaluated for their antiproliferative activity against the four cancer cell lines U87-MG, HepG2, JEG-3, MOLM-13 and against immortalized proximal tubular cells HK2 (see Supporting Information File 1, Table S1, Figures S4–S8). The IC50 values of all tested

• compounds exceeded the highest treated concentration (1000 µM respectively and 500 µM for MOLM-13) or were not defined by the employed method of analysis (see Supporting Information File 1). The findings reveal that these compounds display no antiproliferative activity at the tested concentrations. The

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

• Marco Keller,
• Karl Sauvageot-Witzku,
• Franz Geisslinger,
• Nicole Urban,
• Michael Schaefer,
• Karin Bartel and
• Franz Bracher

Beilstein J. Org. Chem. 2021, 17, 2716–2725, doi:10.3762/bjoc.17.183

• relationships in this chemotype. Keywords: acyl Pictet–Spengler reaction; alkaloids; antiproliferative activity; benzyltetrahydroisoquinolines; ion channels; protective group; total synthesis; Introduction The benzylisoquinoline alkaloids are a large and diverse class of plant secondary metabolites including

• ” retained antiproliferative activity, while losing activity on TPC2 [15]. This prompted us to analyze both TPC2 modulating and antiproliferative activities of the alkaloids from this project. TPC2 modulation To assess the activity of racemic 1-benzyl-1,2,3,4-tetrahydroisoquinoline alkaloids on TPC2 in

• second benzylisoquinoline moiety of the bisbenzylisoquinolines [15]. Antiproliferative activity Several anticancer effects have been reported for benzylisoquinoline alkaloids, for instance antiproliferative and antimigratory as well as chemoresistance-reversing activities [6][15][46][47]. Yet, detailed

Synthesis of new bile acid-fused tetrazoles using the Schmidt reaction

• Dušan Đ. Škorić,
• Olivera R. Klisurić,
• Dimitar S. Jakimov,
• Marija N. Sakač and
• János J. Csanádi

Beilstein J. Org. Chem. 2021, 17, 2611–2620, doi:10.3762/bjoc.17.174

• selective activity towards certain tumor cell lines. Keywords: antiproliferative activity; Schmidt reaction; steroids; tetrazoles; trimethylsilyl azide; Introduction Bile acids are naturally occurring steroidal surfactants that play various biological roles. Besides the well-known role as lipid

• obtained in this way were subjected to antiproliferative activity testing in vitro. It is worth mentioning that the fused tetrazole derivatives of bile acids may possess better hydrophobic–hydrophilic balance, important for aggregation properties, which could be an interesting topic for future research

• KOH solution at room temperature in high yields. In order to gain basic information on the biological activity of synthesized compounds, in vitro antiproliferative activity of compounds 3, 4, 7, 8, and 11–24 was determined. One normal human cell line (MRC-5 fetal fibroblasts) was used together with

Correction: One-pot multicomponent green Hantzsch synthesis of 1,2-dihydropyridine derivatives with antiproliferative activity

• Giovanna Bosica,
• Kaylie Demanuele,
• José M. Padrón and
• Adrián Puerta

Beilstein J. Org. Chem. 2021, 17, 2026–2027, doi:10.3762/bjoc.17.130

• 10.3762/bjoc.17.130 Keywords: antiproliferative activity; 1,2-dihydropyridines; green Hantzsch synthesis; heterogeneous catalysis; one-pot multicomponent reaction; The authors noticed that the E-factor (E) was calculated using a wrong Equation 2 in the original publication: The correct Equation 2 should

On the application of 3d metals for C–H activation toward bioactive compounds: The key step for the synthesis of silver bullets

• Renato L. Carvalho,
• Amanda S. de Miranda,
• Mateus P. Nunes,
• Roberto S. Gomes,
• Guilherme A. M. Jardim and
• Eufrânio N. da Silva Júnior

Beilstein J. Org. Chem. 2021, 17, 1849–1938, doi:10.3762/bjoc.17.126

• (R)-tylocrebrine (32) and (R)-tylophorine (33), which were found to display antiproliferative activity in the nanomolar range against human colorectal carcinoma, human breast carcinoma and drug-resistant human ovarian adenocarcinoma cell lines. Methods for the oxidative homocoupling of phenolic

Synthesis of functionalized imidazo[4,5-e]thiazolo[3,2-b]triazines by condensation of imidazo[4,5-e]triazinethiones with DMAD or DEAD and rearrangement to imidazo[4,5-e]thiazolo[2,3-c]triazines

• Alexei N. Izmest’ev,
• Dmitry B. Vinogradov,
• Natalya G. Kolotyrkina,
• Angelina N. Kravchenko and
• Galina A. Gazieva

Beilstein J. Org. Chem. 2021, 17, 1141–1148, doi:10.3762/bjoc.17.87

• an individual form were found. The methodology proved to be effective for the synthesis of a wide range of target compounds with various substituents in the tricyclic fragment. Investigations of the antiproliferative activity of the synthesized products 4 and 5, as well as possible ways of their

One-pot multicomponent green Hantzsch synthesis of 1,2-dihydropyridine derivatives with antiproliferative activity

• Giovanna Bosica,
• Kaylie Demanuele,
• José M. Padrón and
• Adrián Puerta

Beilstein J. Org. Chem. 2020, 16, 2862–2869, doi:10.3762/bjoc.16.235

• preliminary study of the antiproliferative activity against human solid tumor cells demonstrated that 1,2-DHPs could inhibit cancer cell growth in the low micromolar range. Keywords: antiproliferative activity; 1,2-dihydropyridines; green Hantzsch synthesis; heterogeneous catalysis; one-pot multicomponent

• studied 1,2-DHPs could interfere with tumor cell growth. Thus, we selected a small subset of 1,2-DHPs and screened them against a panel of six human solid tumor cell lines. The results are shown in Table 4. Interestingly, the majority of the 1,2-DHPs displayed antiproliferative activity against all cell

• , the reaction was left to carry on but stopped, and therefore catalyst leaching was not evident. Antiproliferative tests We selected the cancer cell lines A549 and SW1573 (nonsmall-cell lung), HBL-100, as well as T-47D (breast), HeLa (cervix), and WiDr (colon) to evaluate the antiproliferative activity

Synthesis of new dihydroberberine and tetrahydroberberine analogues and evaluation of their antiproliferative activity on NCI-H1975 cells

• Giacomo Mari,
• Lucia De Crescentini,
• Serena Benedetti,
• Francesco Palma,
• Stefania Santeusanio and
• Fabio Mantellini

Beilstein J. Org. Chem. 2020, 16, 1606–1616, doi:10.3762/bjoc.16.133

• fully reduced form of BER, namely tetrahydroberberine (THBER), and its derivatives have proven to present different biological activities. Therefore, the obtained arylhydrazono-functionalized DHBERs were reduced to the corresponding arylhydrazono-THBERs. The antiproliferative activity of both

• their antiproliferative activity directly by precipitation from the reaction medium, avoiding any possible and common subsequent side reactions for this substrate during the purification processes (Scheme 1). On the other hand, also the fully reduced form of BER, namely tetrahydroberberine (THBER) or

• ]. Evaluation of the antiproliferative activity of hydrazono-DHBERs 2 and hydrazono-THBERs 3 As regards the in vitro experiments on lung cancer cells, two different tests were applied to evaluate the effects of hydrazono-DHBERs 2a–n and hydrazono-THBERs 3a–g,i–n [70] on the NCI-H1975 cell proliferation. Both

Synthesis and anticancer activity of bis(2-arylimidazo[1,2-a]pyridin-3-yl) selenides and diselenides: the copper-catalyzed tandem C–H selenation of 2-arylimidazo[1,2-a]pyridine with selenium

• Mio Matsumura,
• Tsutomu Takahashi,
• Hikari Yamauchi,
• Shunsuke Sakuma,
• Yukako Hayashi,
• Tadashi Hyodo,
• Tohru Obata,
• Kentaro Yamaguchi,
• Yasuyuki Fujiwara and
• Shuji Yasuike

Beilstein J. Org. Chem. 2020, 16, 1075–1083, doi:10.3762/bjoc.16.94

• potential antioxidants and showed antiproliferative activity [27][28]. Consequently, they have attracted much attention, and methods for their syntheses have been actively pursued. A powerful method for the synthesis of 3-selanylimidazo[1,2-a]pyridines involves the C–H selenation using imidazopyridine and a

Efficient synthesis of piperazinyl amides of 18β-glycyrrhetinic acid

• Dong Cai,
• ZhiHua Zhang,
• Yufan Meng,
• KaiLi Zhu,
• LiYi Chen,
• ChangXiang Yu,
• ChangWei Yu,
• ZiYi Fu,
• DianShen Yang and
• YiXia Gong

Beilstein J. Org. Chem. 2020, 16, 798–808, doi:10.3762/bjoc.16.73

• modifications at the C3-OH group of 18β-glycyrrhetinic acid are identified to be relatively common and effective. The modification of the C3-OH group, altering the molecular polarity of 18β-glycyrrhetinic acid, may be an advantage in achieving better cytotoxicity or antiproliferative activity [8][9][10]. For

Potent hemithioindigo-based antimitotics photocontrol the microtubule cytoskeleton in cellulo

• Alexander Sailer,
• Franziska Ermer,
• Yvonne Kraus,
• Rebekkah Bingham,
• Ferdinand H. Lutter,
• Julia Ahlfeld and
• Oliver Thorn-Seshold

Beilstein J. Org. Chem. 2020, 16, 125–134, doi:10.3762/bjoc.16.14

• for antimitotic potency in cellulo, since the degree of resazurin turnover scales to the number of cells still viable after compound treatment, although the mechanism behind antiproliferative activity must later be determined using more specific assays. We used the HeLa human cervical cancer cell line

Isolation and characterisation of irinans, androstane-type withanolides from Physalis peruviana L.

• Annika Stein,
• Dave Compera,
• Bianka Karge,
• Mark Brönstrup and
• Jakob Franke

Beilstein J. Org. Chem. 2019, 15, 2003–2012, doi:10.3762/bjoc.15.196

• . Considering the potent bioactivities of androstanes as well as withanolides, we wondered whether the loss of the side-chain lactone would negatively impact the antiproliferative activity. Irinan A (2) and B (3) together with 4ß-hydroxywithanolide E (1) as a positive control were evaluated against a panel of

• exclude that unidentified impurities, which could not be removed by repeated preparative HPLC, obscure the true EC50 values of irinans. We conclude that irinans possess potent antiproliferative activity, that is however reduced compared to 4ß-hydroxywithanolide E (1). Our results demonstrate the