Results 241 to 250 of about 46,982 (304)
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Spin-Carrying Benzoquinone Derivatives
The Journal of Organic Chemistry, 2009Several 1,4-benzoquinone derivatives carrying oxy-TEMPO radical(s) at the 2-position or 2,5-positions were found to give black crystals by recrystallization from pale yellow solutions and it was revealed from their crystal structures that unusual single-component CT complexes were formed, in which a nitroxide moiety plays the roll of a donor part and a
Shin'ichi, Nakatsuji +4 more
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The Journal of Organic Chemistry, 1996
The structure and energetics of protonated p-benzoquinone (pBQ) have been investigated using high-pressure mass spectrometry and ab initio calculations. The experimental proton affinity of pBQ is 801.4 +/- 8.9 kJ/mol (191.5 +/- 2.1 kcal/mol) (1sigma) from bracketing measurements and hydration thermochemistry.
Karl K., Irikura +4 more
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The structure and energetics of protonated p-benzoquinone (pBQ) have been investigated using high-pressure mass spectrometry and ab initio calculations. The experimental proton affinity of pBQ is 801.4 +/- 8.9 kJ/mol (191.5 +/- 2.1 kcal/mol) (1sigma) from bracketing measurements and hydration thermochemistry.
Karl K., Irikura +4 more
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Stereoregular Poly(benzoquinone imines) from Methyl-Substituted Benzoquinones
Macromolecules, 1997Stereoregular poly(benzoquinone imine)s have been synthesized by polycondensation of dimethylbenzoquinone with 4,4'thiodianiline and 4,4'methylendianiline.
Harold W. Boone +4 more
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Amino-substituted p-benzoquinones
Journal of Medicinal Chemistry, 1986Based on the observation of outstanding antineoplastic activity of a number of amino-substituted anthraquinones, thioxanthones, and N-(aminoethyl)-substituted naphthalimides, four types of amino-substituted p-benzoquinones were designed, synthesized, and their biological activity evaluated. Although none of these compounds exhibited inhibitory activity
A E, Mathew, R K, Zee-Cheng, C C, Cheng
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2001
[106-51-4] C6H4O2 (MW 108.10) InChI = 1S/C6H4O2/c7-5-1-2-6(8)4-3-5/h1-4H InChIKey = AZQWKYJCGOJGHM-UHFFFAOYSA-N (useful as an oxidizing1 or dehydrogenation agent;2 can function as a dienophile3 in the Diels–Alder reaction or as a dipolarophile to prepare 5-hydroxyindole derivatives4) Alternate Name: p-benzoquinone.
Teng-Kuei Yang, Chi-Yung Shen
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[106-51-4] C6H4O2 (MW 108.10) InChI = 1S/C6H4O2/c7-5-1-2-6(8)4-3-5/h1-4H InChIKey = AZQWKYJCGOJGHM-UHFFFAOYSA-N (useful as an oxidizing1 or dehydrogenation agent;2 can function as a dienophile3 in the Diels–Alder reaction or as a dipolarophile to prepare 5-hydroxyindole derivatives4) Alternate Name: p-benzoquinone.
Teng-Kuei Yang, Chi-Yung Shen
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Thermochemistry of benzoquinones
The Journal of Chemical Thermodynamics, 2004A thermochemical study of the p-benzoquinone and the duroquinone has been performed by different calorimetric techniques. Applying heat flux calorimetry and differential scanning calorimetry, the enthalpies of fusion for each substance were measured. Enthalpies of combustion in condensed phase were determined by static bomb combustion calorimetry hence
Aarón Rojas-Aguilar +3 more
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A fluorinated masked o-benzoquinone
Journal of Fluorine Chemistry, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Timothy B. Patrick +3 more
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Alkylated benzoquinones from Iris kumaonensis ☆
Phytochemistry, 2002Six novel alkylated p-Benzoquinones irisoquin (A-F) (1-2, 4-7) together with a known cytotoxic quinone, irisoquin (3) along with three known isoflavones, tectoregenin, iristectorin and irigenin were isolated from the rhizomes of Iris kumaonensis and characterized.
Umar, Mahmood +2 more
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Methylation of substituted 1,4-benzoquinones
Collection of Czechoslovak Chemical Communications, 1987Methylation of 1,4-benzoquinones I and Ia with diazomethane afforded methyl 15-(6-methoxy-3-methyl-1,4-benzoquinon-2-yl)pentadecanoate (IIa) and methyl 15-(3-methoxy-2,5-dioxobicyclo[4.1.0]hept-3-en-1-yl)pentadecanoate (IIIa), methylation of 1,4-benzoquinone IVa led to methyl 15-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)pentadecanoate (Va) and ...
Jaroslav Kopecký +2 more
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Deslongchamps Annulations with Benzoquinone Monoketals
Organic Letters, 2011The so-called Deslongchamps annulation of deprotonated γ,δ-unsaturated β-ketoesters 15 to 2-(alkoxycarbonyl)cyclohex-2-en-1-ones or similarly activated cyclohex-2-en-1-ones offers a versatile access to various kinds of decalindiones. The scope of Deslongchamps annulations was extended by establishing acceptor-substituted benzoquinone monoketals such as
Petrović, Denis, Brückner, Reinhard
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