5691-54-3Relevant articles and documents
Preparation and structure-activity relationships of novel asterriquinone derivatives
Kaji, Akira,Kimura, Kengo,Teranishi, Masanori,Kiriyama, Noriki,Nomura, Masaaki,Miyamoto, Ken-Ichi
, p. 1325 - 1329 (2007/10/03)
Asterriquinone (ARQ, la) is an antitumor metabolite of Aspergillus terreus IFO 6123. To gain insight into the structure-activity relationships of ARQ, a series of chemically modified derivatives (1 - 6), the ARQ analogues (b - e) and the 2,5-dihydroxy-p-benzoquinone analogues (f - h), were prepared, and cytotoxic activity against mouse leukemia P388 cells investigated. Results indicated that: 1) at least one hydroxy group or acetoxy group in the p-benzoquinone moiety is important to exhibit cytotoxicity; 2) in the p-benzoquinone moiety, a single methoxy group and/or one acetoxy group substitution showed more potent cytotoxicity than when two hydroxy groups are substituted (1); 3) the indole ring is important for the cytotoxicity of ARQ analogues; 4) the 1,1-dimethyl-2-propenyl group in the indole ring is not important for the cytotoxic activity of ARQ.
Partial deacetylation of asterriquinone diacetate by aqueous sodium bicarbonate in pyridine
Kaji,Kimura,Iwata,Kiriyama
, p. 1818 - 1820 (2007/10/03)
Asterriquinone (ARQ); 2,5 -bis[1-(1,1-dimethyl-2-propenyl)-1H-indol-3- yl]-3,6-dihydroxy-2,5-cyclohexadiene-1,4-dione and ARQ monoacetate are metabolites from mycelium of Aspergillus terreux IFO 6123. ARQ diacetate was convened into ARQ monoacetate by treatment with 5% aq. NaHCO3 in pyridine at 80°C for 5 min, and the yield was 93.4%. Similarly, by treatment with 5% aq. NaHCO3 in acetone at room temperature, 2,5-diacetoxy-p-xyloquinone and 2,5- diacetoxy-p-benzoquinone were convened into 2-acetoxy-5-hydroxy-p-xyloquinone (yield, 85.8%) and 2-acetoxy-5-hydroxy-p-benzoquinone (yield, 66.7%), respectively.
Triphendioxazine dyestuffs
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, (2008/06/13)
Triphendioxazine dyestuffs of the formula STR1 having the substituent meanings specified in the descriptive part, are highly suitable for dyeing and printing hydroxyl- or amido-containing materials, in particular fibre materials, and produce wash-fast dyeings and prints.