548-30-1Relevant articles and documents
Photooxidation of alkaloids: Considerable quantum yield enhancement by rose bengal-sensitized singlet molecular oxygen generation
Goerner, Helmut,Miskolczy, Zsombor,Megyesi, Monika,Biczok, Laszlo
, p. 1315 - 1320 (2011)
The photooxidation of sanguinarine, coralyne and berberine was studied in oxygenated alkaline methanol solutions. Rose bengal as photosensitizer significantly accelerates the process, indicating the importance of singlet molecular oxygen in the reaction mechanism. The quantum yield of sensitized oxidation was found to increase significantly with pH and reaches 0.4 for berberine at pH 13.8. The direct oxidation of alkaloids is less efficient, the quantum yield does not exceed 0.01 even in oxygen-saturated solutions. The photoinduced electron ejection does not play a role in the oxidation. The uncharged pseudobase forms, which are present in alkaline medium, are oxidized much more easily than the alkaloid cations. The quantum yield of rose bengal-sensitized photooxidation of berberine and coralyne alkaloids increases significantly with pH. Singlet molecular oxygen plays an important role in the reaction mechanism.
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Schlemmer,Gempp
, p. 506,515 (1938)
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Pandey et al.
, p. 695 (1979)
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The synthesis and biological evaluation of sanguinarine derivatives as anti-non-small cell lung cancer agents
Ding, Ke,Jiang, Liang,Lu, Xiaoyun,Wang, Xiaolu,Wang, Yuting,Xu, Fang,Zhang, Zhang
, p. 293 - 296 (2020/04/17)
A novel series of sanguinarine (SA) derivatives were synthesized and evaluated as anti-non-small cell lung cancer (NSCLC) agents. The compounds inhibited A549 and H1975 NSCLC cells with IC50 values of 0.96->30 ΜM and 0.79->30 ΜM, respectively. Compounds 8d-8j exhibited low micromolar inhibitory activity and indicated that the C6-position of SA was tolerated to be substituted by hydrophilic groups and CN. Further investigation of their mechanism of action showed that compound 8h induced apoptosis of A549 and H1975 cells by inhibiting the Akt signaling pathway and elevating the reactive oxygen species (ROS). This study provided a strategy for developing new anti-cancer agents.
New methods for the synthesis of naphthyl amines; Application to the synthesis of dihydrosanguinarine, sanguinarine, oxysanguinarine and (±)-maclekarpines B and C
Tatton, Matthew R.,Simpson, Iain,Donohoe, Timothy J.
supporting information, p. 11314 - 11316 (2014/11/07)
A new method for preparing naphthyl amines from 1,5 unsaturated dicarbonyl precursors is described; the utility of this new method was proven in the syntheses of several natural products, all containing the benzo[c]phenanthridine core and enabled by a radical promoted cyclisation of the naphthyl amine products formed in the key cyclisation. the Partner Organisations 2014.