scholarly journals Synthesis of Alicyclic 2-Methylenethiazolo[2,3-b]quinazolinone Derivatives via Base-Promoted Cascade Reactions

Synthesis ◽  
2021 ◽  
Author(s):  
Márta Palkó ◽  
Mohamed El Haimer ◽  
Tünde Faragó ◽  
Zsuzsanna Schelz ◽  
István Zupkó

AbstractThe synthesis of alicyclic 2-methylenethiazolo[2,3-b]quinazo­l­inones is performed via base-promoted cascade reactions, starting from either alicyclic β-amino propargylamides using carbon disulfide, or from alicyclic ethyl 2-isothiocyanatocarboxylates by addition of propargylamine. In both cases the cascade reaction proceeds by way of a favoured 5-exo-dig process during the second ring closure, as confirmed by full NMR spectroscopic assignments. Moreover, a high-yielding retro­-Diels–Alder (RDA) reaction is performed on the norbornene derivatives leading to 2-methylene-2H-thiazolo[3,2-a]pyrimidin-5(3H)-ones. The obtained compounds exert modest antiproliferative activities against a panel of human gynaecological cancer cell lines.

2019 ◽  
Vol 16 (2) ◽  
pp. 117-121 ◽  
Author(s):  
Peipei Han ◽  
Wenhua Zhou ◽  
Mingxia Chen ◽  
Qiuan Wang

A series of eight polymethoxychalcone Mannich base derivatives 2a-2h was synthesized via the microwave-assisted Mannich reaction of natural product 2'-hydroxy-3,4,4',5,6'-pentamethoxychalcone (1) with various secondary amines and formaldehyde. Compared to conventional heating method (80°C), the microwave-assisted method (700W, 65°C) is efficient with short reaction time (0.5-1 h) and good yields (74-88%). The antiproliferative activities of eight Mannich base derivatives were evaluated in vitro on a panel of three human cancer cell lines (Hela, HCC1954 and SK-OV-3) by CCK-8 assay. The results showed that all of the Mannich base derivatives exhibited potential antiproliferative activities on tested cancer cell lines with the IC50 values of 9.13-48.51 µM. Some active compounds exhibited more activity as compared to positive control cis-Platin. Among them, compound 2b revealed to have the strongest antiproliferative activity against all the three cancer cell lines with IC50 values ranging from 9.13 to 11.24 µM.


Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 368
Author(s):  
Elda M. Melchor Martínez ◽  
Luisaldo Sandate-Flores ◽  
José Rodríguez-Rodríguez ◽  
Magdalena Rostro-Alanis ◽  
Lizeth Parra-Arroyo ◽  
...  

Cacti fruits are known to possess antioxidant and antiproliferative activities among other health benefits. The following paper evaluated the antioxidant capacity and bioactivity of five clarified juices from different cacti fruits (Stenocereus spp., Opuntia spp. and M. geomettizans) on four cancer cell lines as well as one normal cell line. Their antioxidant compositions were measured by three different protocols. Their phenolic compositions were quantified through high performance liquid chromatography and the percentages of cell proliferation of fibroblasts as well as breast, prostate, colorectal, and liver cancer cell lines were evaluated though in vitro assays. The results were further processed by principal component analysis. The clarified juice from M. geomettizans fruit showed the highest concentration of total phenolic compounds and induced cell death in liver and colorectal cancer cells lines as well as fibroblasts. The clarified juice extracted from yellow Opuntia ficus-indica fruit displayed antioxidant activity as well as a selective cytotoxic effect on a liver cancer cell line with no toxic effect on fibroblasts. In conclusion, the work supplies evidence on the antioxidant and antiproliferative activities that cacti juices possess, presenting potential as cancer cell proliferation preventing agents.


2018 ◽  
Vol 47 (8) ◽  
pp. 2822-2822 ◽  
Author(s):  
Karolina Kowalczyk ◽  
Andrzej Błauż ◽  
Wojciech M. Ciszewski ◽  
Anna Wieczorek ◽  
Błażej Rychlik ◽  
...  

Correction for ‘Colchicine metallocenyl bioconjugates showing high antiproliferative activities against cancer cell lines’ by Karolina Kowalczyk et al., Dalton Trans., 2017, 46, 17041–17052.


2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Shengxian Zhao ◽  
Yin Cao ◽  
Zhenzhen Cui ◽  
Jiayun Zhang ◽  
Zhixiang Pan ◽  
...  

A series of 2-arylidene-N-(quinolin-6-yl)hydrazine-1-carboxamides 5a–5o were synthesized and characterized. The synthesized compounds (5a–5o) were screened in vitro against three breast cancer cell lines: SKBR3, MDA-MB-231, and MCF-7 cancer cell lines by the MTT assay. According to MTT results, compounds 5k and 5l showed better antiproliferative activities over MCF-7 cell lines with IC50 values of 8.50 and 12.51 μM. Colony formation assay indicated 5k/5l treatment obviously inhibited the growth of MCF-7 cells and 5k/5l-induced cell cycle was arrested in the G2-M phase. Moreover, 5k/5l significantly increased the level of cleaved PARP and induced the apoptosis in MCF-7 cells. In addition, compared to Hela cells, MCF-7 cells were more sensitive to 5k/5l treatment.


2006 ◽  
Vol 9 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Changqing Wu ◽  
Feng Chen ◽  
James W. Rushing ◽  
Xi Wang ◽  
Hyun-Jin Kim ◽  
...  

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 27501-27516 ◽  
Author(s):  
Ádám Baji ◽  
András Gyovai ◽  
János Wölfling ◽  
Renáta Minorics ◽  
Imre Ocsovszki ◽  
...  

Steroidal and nonsteroidal ring-fused quinolines were efficiently synthesized under microwave conditions and their antiproliferative activities were investigated.


2020 ◽  
Author(s):  
Mujeeb A. Sultan ◽  
Usama Karama ◽  
Abdulrahman I. Almansour ◽  
Kamal Eldin El-Taher ◽  
Yasser A. Elnakady ◽  
...  

Abstract A novel chlorinated tetracyclic compound 13 of the class ethanoanthracene, as analogue of maprotiline, was prepared via multistep syntheses. The tetracyclic key intermediates 4 and 5 with its [2.2.2] system were built via a Diels-Alder reaction between acrolein and 1,8-dichloroanthracene.The synthesized chlorinated maprotiline analogues 6 , 7 and 13 as well intermediates 4 and 5 exerted antiproliferative activity against cancer cell lines A549 and HepG2 at low micromolar concentrations. In addition, the intermediates 4 and 5 exerted high antiproliferative activity against HCT cell line. Interestingly, the intermediate 4 was the most active against all treated cell lines.


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