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Volumn 20, Issue 22, 2010, Pages 6416-6420

Synthesis and biological evaluation of furoxan-based nitric oxide-releasing derivatives of glycyrrhetinic acid as anti-hepatocellular carcinoma agents

Author keywords

Anti hepatocellular carcinoma agent; Furoxan; Glycyrrhetinic acid; Hybrid compound; NO donor; NO releasing

Indexed keywords

ANTINEOPLASTIC AGENT; GLYCYRRHETINIC ACID DERIVATIVE; HEMOGLOBIN; NITRIC OXIDE DONOR;

EID: 77958067172     PISSN: 0960894X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.bmcl.2010.09.070     Document Type: Article
Times cited : (50)

References (33)
  • 22
    • 77958054398 scopus 로고    scopus 로고
    • note
    • General procedure for the synthesis of the target compounds 4a-h: DMAP (0.1 mmol) and appropriate phenylsulfonylfuroxans 1a-h (0.31 mmol) were added to a mixture solution of 3-O-hemisuccinate GA methyl ester 3 (0.26 mmol) and DCC (0.33 mmol) in dry dichloromethane. The reaction mixture was stirred at room temperature for 24 h. Filtration and removal of the solvent in vacuo afforded the crude product, which was subsequently purified by column chromatography using (PE/EtOAc = 3:1) to give pure 4a-h in 65-70% yields.
  • 26
    • 77958024981 scopus 로고    scopus 로고
    • note
    • 4, and concentrated under reduced pressure. The crude product was purified by column chromatography (PE/EtOAc = 2:1) to yield 7a-g.
  • 27
    • 77958025309 scopus 로고    scopus 로고
    • note
    • 10S: C, 64.45; H, 7.01; N, 5.12. Found: C, 64.25; H, 7.06; N, 5.03.
  • 29
    • 77958026797 scopus 로고    scopus 로고
    • note
    • General procedure for the synthesis of the target compounds 13a, 13b, 13d, 13e and 13g: 3-Acetoxy-glycyrrhetinic acid 9 (6.0 mmol) dissolved in dry dichloromethane (20 mL), was added oxalyl chloride (3.0 mL) by slow dropwise. The mixture was stirred at room temperature for 4 h, followed by concentration under reduced pressure to 3-acetoxy-11-oxo-olean-12-en-30-oyl chloride 12. A mixture of 12 (0.52 mmol) and appropriate phenylsulfonylfuroxans 1a-g (0.53 mmol) in dry THF (20 mL) was refluxed in presence of triethylamine (0.2 mL) for 12 h. The solution was cooled to room temperature. After filtration, the filtrate was evaporated in vacuo and the crude product was purified by column chromatography (PE/EtOAc = 5:1) to obtain pure 13a, 13b, 13d, 13e and 13g in 80-85% yield.
  • 30
    • 77958033284 scopus 로고    scopus 로고
    • note
    • 5/well were cultured in 96-well plates overnight and treated in triplicate with different concentrations of individual compounds for 24 h. Cells cultured in medium alone or treated with vehicle were used as negative controls. During the last 4 h incubation, the cells were exposed to MTT (5 mg/mL, sigma) and the resulting formazan crystals were dissolved in 200 μM DMSO, followed by measuring at 570 nm on a microplate reader (Thermo, USA).
  • 32
    • 77958055832 scopus 로고    scopus 로고
    • note
    • Nitrate/nitrite measurement in vitro: The human hepatocellular carcinoma (HepG2, BEL-7402) and non-tumor liver (LO2) cells were cultured in the 24-well plates for 24 h and treated in triplicate with 100 μM of individual compounds for 30-300 min. The cells were harvested longitudinally and their lysates were prepared. The levels of nitrate/nitrite in the lysates were determined using the nitrate/nitrite colorimetric assay kit, according to manufacturers' instruction (Beyotime, China).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.