2961-04-8Relevant articles and documents
1,4-Anthraquinonoid dienophiles applicable to synthesis of linear tetracycles
Cameron,Conn,Crossley,et al.
, p. 2417 - 2420 (1986)
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Synthesis and activity of substituted anthraquinones against a human filarial parasite, Brugia malayi
Dhananjeyan, Mugunthu R.,Milev, Youli P.,Kron, Michael A.,Nair, Muraleedharan G.
, p. 2822 - 2830 (2007/10/03)
Lymphatic filariasis (elephantiasis) is a global public health problem caused by the parasitic nematodes Wuchereria bancrofti and Brugia malayi. We have previously reported anthraquinones from daylily roots with potent activity against pathogenic trematode Schistosoma mansoni. Here we report the synthesis of novel anthraquinones A-S and their antifilrarial activity. Anthraquinones A-S were synthesized by a single-step Friedel-Crafts acylation reaction between phthalic anhydrides and substituted benzenes. The antifilarial properties of these synthetic anthraquinones were tested against microfilaria as well as adult male and female worms of B. malayi. The most active anthraquinone was K, which showed 100% mortality within 1, 5, and 3 days, respectively, against microfilaria and adult male and female worms at 5 ppm concentration. Albendazole, an oral drug currently used to treat parasitic infections, was used as a positive control. Methylated products of anthraquinones did not affect the microfilaria. Histological examination of treated adult female parasites showed most of the anthraquinones caused marked effects on intrauterine embryos.
REGIOSELECTIVE REACTIONS OF 9-HYDROXY-10-CHLORO-1,4-ANTHRAQUINONE. SYNTHESIS OF DIGITOPURPONE AND ISLANDICIN
Gorelik, M. V.,Arinich, L. V.,Kotlyarevskii, O. I.,Fes'kova, E. A.
, p. 129 - 138 (2007/10/02)
9-Hydroxy-10-chloro-1,4-anthraquinone, obtained in the reaction of 1,4-dihydroxy-9,10-anthraquinone with thionyl chloride, is nitrated selectively at the peri position to the chlorine atom and is converted into 5-nitro-9-hydroxy-10-chloro-1,4-anthraquinone.The isomeric 8-nitro-9-hydroxy-10-chloro-1,4-anthraquinone is formed during the hydrolysis of the nitration product and the subsequent reaction of 5-nitro-1,4-dihydroxy-9,10-anthraquinone with thionyl chloride.The reaction of 9-hydroxy-10-chloro-1,4-anthraquinone and its nitro derivatives with the carbanion generated from malonic ester leads to selective alkylation at position 3.Together, the indicated reactions make it possible to realize the regioselective synthesis of 2-methyl-1,4,8- and 2-methyl-1,4,5-trihydroxy-9,10-anthraquinones.