2,5-Dimethylquinone
2,5-Dimethylquinone structure
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Common Name | 2,5-Dimethylquinone | ||
|---|---|---|---|---|
| CAS Number | 137-18-8 | Molecular Weight | 136.148 | |
| Density | 1.1±0.1 g/cm3 | Boiling Point | 200.9±15.0 °C at 760 mmHg | |
| Molecular Formula | C8H8O2 | Melting Point | 123-125ºC | |
| MSDS | Chinese USA | Flash Point | 71.1±17.4 °C | |
| Symbol |
GHS06 |
Signal Word | Danger | |
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Enantioselective total synthesis of cyathin A3.
Org. Lett. 9(15) , 2843-6, (2007) The total synthesis of (-)-cyathin A3 is described. The key step involves an unusual enantioselective Diels-Alder reaction of 2,5-dimethyl-1,4-benzoquinone with 2,4-bis(trimethylsilyloxy)-1,3-pentadiene, using Mikami's catalyst [(R)-BINOL + Cl2Ti(OiPr)2 + 4 A... |
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Chemical defense of an opilionid (Acanthopachylus aculeatus).
J. Exp. Biol. 207(Pt 8) , 1313-21, (2004) The opilionid Acanthopachylus aculeatus was shown to produce a defensive secretion containing quinones (2,3-dimethyl-1,4-benzoquinone, 2,5-dimethyl-1,4-benzoquinone and 2,3,5-trimethyl-1,4-benzoquinone), confirming the findings reported nearly a half century ... |
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Inhibition of jack bean urease by 1,4-benzoquinone and 2,5-dimethyl-1,4-benzoquinone. Evaluation of the inhibition mechanism.
J. Enzyme Inhib. Med. Chem. 17(4) , 247-53, (2002) 1,4-benzoquinone (BQ) and 2,5-dimethyl-1,4-benzoquinone (DMBQ) were studied as inhibitors of jack bean urease in 50 mM phosphate buffer, pH 7.0. The mechanisms of inhibition were evaluated by progress curves studies and steady-state approach to data achieved ... |
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Quinone-induced inhibition of urease: elucidation of its mechanisms by probing thiol groups of the enzyme.
Bioorg. Chem. 35(3) , 233-42, (2007) In this work we studied the reaction of four quinones, 1,4-benzoquinone (1,4-BQ), 2,5-dimethyl-1,4-benzoquinone (2,5-DM-1,4-BQ), tetrachloro-1,4-benzoquinone (TC-1,4-BQ) and 1,4-naphthoquinone (1,4-NQ) with jack bean urease in phosphate buffer, pH 7.8. The en... |
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Chlorophyll a fluorescence transient as an indicator of active and inactive Photosystem II in thylakoid membranes.
Biochim. Biophys. Acta 1015(2) , 180-8, (1990) Upon illumination, a dark-adapted photosynthetic sample shows time-dependent changes in chlorophyll (Chl) a fluorescence yield, known as the Kautsky phenomenon or the OIDPS transient. Based on the differential effects of electron acceptors such as 2,5-dimethy... |
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An antiproliferative bis-prenylated quinone from the New Zealand brown alga Perithalia capillaris.
J. Nat. Prod. 70 , 2042-4, (2007) Bioactivity-directed isolation work on the endemic New Zealand brown alga Perithalia capillaris, seeking anti-inflammatory compounds, led to a new bis-prenylated quinone ( 4). This compound inhibited superoxide production by human neutrophils in vitro (IC 50 ... |
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Adenylate regulation of photosynthetic electron transport and the coupling sites of phosphorylation in spinach chloroplasts.
J. Bioenerg. Biomembr. 8(5) , 247-55, (1976) The regulation by adenylates of activities of various partial electron transport systems in spinach chloroplasts was studied using systems from H2O to 2,5-dimethyl-p-benzoquinone, H2O to 2,6-dichlorophenolindophenol, reduced 2,6-dichlorophenolindophenol to me... |
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The catecholamine-mediated positive inotropic effect of simple quinones is related to superoxide anion generation.
J. Pharmacol. Exp. Ther. 260(2) , 468-73, (1992) In guinea pig and rat cardiac tissue, redox cycling benzoquinones (2,5-dimethyl-p-benzoquinone and duroquinone) and naphthoquinones (menadione and 2,3-dimethoxy-1,4-naphthoquinone) generated superoxide anion (O2-.) both through one- and two-electron reduction... |
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Synthesis and antifungal activity of benzofuran-5-ols.
Bioorg. Med. Chem. Lett. 20 , 6777-80, (2010) Benzofuran-5-ol derivatives were synthesized and tested for in vitro antifungal activity against Candida, Aspergillus species, and Cryptococcus neoformans. Among them tested, many benzofuran-5-ols showed good antifungal activity. The results suggest that benz... |
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Substitution of Ala-251 of the D1 reaction centre polypeptide with a charged residue results in impaired function of photosystem II.
Plant Mol. Biol. 38(6) , 1191-200, (1998) Ala-251 in the membrane-parallel helix in the D-E loop of the D1 polypeptide close to the Q(B) pocket of photosystem II (PS II), was mutated to aspartate (D), lysine (K), leucine (L) or serine (S) in Synechocystis 6803. O2 evolution rates (H2O-->DCBQ; 2,6-dic... |