76635-76-2Relevant academic research and scientific papers
TARGETED RADIOPHARMACEUTICALS FOR THE DIAGNOSIS AND TREATMENT OF PROSTATE CANCER
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, (2021/01/29)
A compound of general formula (I): wherein: n is 1, 2 or 3; R1, R2, R3 and R4, independently represent OH or Q; and 20 Q represents a tissue-targeting moeity selected from the group consisting of or a stereoisomer, a hydrate, a solvate, or a salt thereof, or a mixture of same, methods of preparing said compounds, intermediate compounds useful for preparing said compounds, pharmaceutical compositions and combinations comprising said compounds and the use of said 25 compounds for manufacturing pharmaceutical compositions for the treatment or prophylaxis of diseases, in particular of soft tissue diseases, as a sole agent or in combination with other active ingredients.
Selective fluorescence sensing of Cu(II) and Zn(II) using a simple Schiff base ligand: Naked eye detection and elucidation of photoinduced electron transfer (PET) mechanism
Ganguly, Aniruddha,Ghosh, Soumen,Kar, Samiran,Guchhait, Nikhil
, p. 72 - 80 (2015/05/19)
A simple Schiff base compound 2-((cyclohexylmethylimino)-methyl)-naphthalen-1-ol (2CMIMN1O) has been synthesized and characterized by 1H NMR, 13C NMR and FT-IR spectroscopic techniques. A significantly low emission yield of the compound has been rationalized in anticipation with photo-induced electron transfer (PET) from the imine receptor moiety to the naphthalene fluorophore unit. Consequently, an evaluation of the transition metal ion-induced modification of the fluorophore-receptor communication reveals the promising prospect of the title compound to function as a chemosensor for Cu2+ and Zn2+ ions selectively, through remarkable fluorescence enhancement as well as visual changes. While perturbation of the PET process has been argued to be the plausible mechanism behind the fluorescence enhancement, the selectivity for these two metal ions has been interpreted on the grounds of an appreciably strong binding interaction. Particularly notable aspects regarding the chemosensory activity of the compound is its ability to detect the aforesaid transition metal ions down to the level of micromolar concentration (detection limit being 2.74 and 2.27 ppm respectively), along with a simple and efficient synthetic procedure.
Synthesis of novel naphthoquinone aliphatic amides and esters and their anticancer evaluation
Kongkathip, Boonsong,Akkarasamiyo, Sunisa,Hasitapan, Komkrit,Sittikul, Pichamon,Boonyalai, Nonlawat,Kongkathip, Ngampong
, p. 271 - 284 (2013/03/28)
Fourteen new naphthoquinone aliphatic amides and seventeen naphthoquinone aliphatic esters were synthesized in nine to ten steps from 1-hydroxy-2- naphthoic acid with 9-25% overall yield for the amides, and 16-21% overall yield for the esters. The key step of the amide synthesis is a coupling reaction between amine and various aliphatic acids using 4-(4,6-dimethoxy-1,3,5-triazin- 2-yl)-4-methylmorpholinium chloride (DMTMM) as a coupling agent while for the ester synthesis, DCC/DMAP or CDI was used as the coupling reagent between aliphatic acids and naphthoquinone alcohol. Both naphthoquinone amides and esters were evaluated for their anticancer activity against KB cells. It was found that naphthoquinone aliphatic amides showed stronger anticancer activity than those of the esters when the chains are longer than 7-carbon atoms. The optimum chain of amides is expected to be 16-carbon atoms. In addition, naphthoquinone aliphatic esters with α-methyl on the ester moiety possessed much stronger anticancer activity than the straight chains. Decatenation assay revealed that naphthoquinone amide with 16-carbon atoms chain at 15 μM and 20 μM can completely inhibit hTopoIIα activity while at 10 μM the enzyme activity was moderately inhibited. Molecular docking result also showed the same trend as the cytotoxicity and decatenation assay.
Transforming rhinacanthin analogues from potent anticancer agents into potent antimalarial agents
Kongkathip, Ngampong,Pradidphol, Narathip,Hasitapan, Komkrit,Grigg, Ronald,Kao, Wei-Chun,Hunte, Carola,Fisher, Nicholas,Warman, Ashley J.,Biagini, Giancarlo A.,Kongsaeree, Palangpon,Chuawong, Pitak,Kongkathip, Boonsong
scheme or table, p. 1211 - 1221 (2010/08/07)
Twenty-six novel naphthoquinone aliphatic esters were synthesized by esterification of 1,4-naphthoquinone alcohols with various aliphatic acids. The 1,4-naphthoquinone alcohols were prepared from 1-hydroxy-2-naphthoic acid in nine steps with excellent yields. Twenty-four of the novel synthetic naphthoquinone esters showed significant antimalarial activity with IC 50 values in the range of 0.03-16.63 μM. The length of the aliphatic chain and the presence of C-2′ substituents on the propyl chain affected the activity. Interestingly, compounds 31 and 37 showed very good antimalarial activity and were not toxic to normal Vero cells, and the PTI values of 31 (> 1990.38) and 37 (1825.94) are excellent. Both 31 and 37 showed potent inhibition against P. falciparum 3D7 cyt bc1 and no inhibition on rat cyt bc1. They showed IC50 values in the nanomolar range, providing full inhibition of cyt bc1 with one molecule inhibitor bound per cyt bc1 monomer at the Qo site.
Synthesis of 3,3′-(4H,4′H)-spirobi(2H-naphtho[1,2-b]pyran)-6, 6′-dicarboxylic acid and its optical resolution
Tojo, Kenta,Arisawa, Tatsuya,Yasutake, Mikio,Aoki, Yoshio,Teninuma, Daiyo
supporting information; experimental part, p. 930 - 931 (2009/04/05)
The synthesis and optical resolution of 3,3′-(4H,4′H)- spirobi(2H-naphtho[1,2-b]pyran)-6,6′-dicarboxylic acid were successfully accomplished. The formation of the spiro skeleton and the bromination of the aromatic ring were easily achieved in the presence of bromine. Optical resolution was achieved by amidation with L-valinol (2-amino-3-methyl-1-butanol) . Copyright
Potent antitumor activity of synthetic 1,2-naphthoquinones and 1,4-naphthoquinones
Kongkathip, Ngampong,Kongkathip, Boonsong,Siripong, Pongpun,Sangma, Chak,Luangkamin, Suwaporn,Niyomdecha, Momad,Pattanapa, Suppachai,Piyaviriyagul, Suratsawadee,Kongsaeree, Palangpon
, p. 3179 - 3191 (2007/10/03)
Rhinacanthone (1) and two 1,2-pyranonaphthoquinones (2,3) were synthesized and found to show very potent cytotoxicity against three cancer cell lines (KB, HeLa and HepG2) with IC50 values of 0.92-9.63 μM, whereas the corresponding hydroxylated derivative 4 had reduced cytotoxicity (IC50 values of 7.61-24.13 μM). Three 1,2-furanonaphthoquinone derivatives (5-7) were also synthesized with similar cytotoxicity as 1,2-pyranonaphthoquinones. In comparison to 1,2-naphthoquinones, six 1,4-naphthoquinones derivatives fused with pyran ring (8-10) and furan ring (11-13) were synthesized and they showed less cytotoxicity or inactive to the cancer cell lines. Moreover, compound 13 had significant cytotoxicity against HeLa cell line (IC50 value of 9.25 μM) while it showed no toxic to vero cell.
TRICYCLIC AMIDES
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, (2008/06/13)
The invention relates to a compound selected from these of formula (I) : STR1 in which R 7, R 8, Y, n and A are as defined in the description, and medicinal product containing the same useful for treating a disorder of the melatoninergic system.
Antihyperglycemic Activity of Novel Naphthalenyl 3H-1,2,3,5-Oxathiadiazole 2-Oxides
Ellingboe, John W.,Lombardo, Louis J.,Alessi, Thomas R.,Nguyen, Thomas T.,Guzzo, Frieda,et al.
, p. 2485 - 2493 (2007/10/02)
A series of naphthalenyl 3H-1,2,3,5-oxathiadiazole 2-oxides was prepared and tested for antihyperglycemic activity in the db/db mouse, a model for type 2 (non-insulin dependent) diabetes mellitus.Substitution at the 1-,5-, or 8-positions of the naphthalene ring with a halogen was found to be beneficial to antihyperglycemic activity. 4--3H-1,2,3,5-oxathiadiazole 2-oxide (45), one of the most potent compounds in this series, was selected for further pharmacological evaluation.
