ライフサイエンスコーパス: benzoquinone

1 n reaction (DDQ=2,3-dichloro-5,6-dicyano-1,4-benzoquinone).

2 n that formed nonadsorbing products (i.e., p-benzoquinone).

3 an enzymatic reaction to proceed, generating benzoquinone.

4 ool using 5-dibromo-6-isopropyl-3-methyl-1,4-benzoquinone.

5 und to be efficient for the C-H arylation of benzoquinone.

6 2,4,6-tribromophenol to form 2,6-dibromo-1,4-benzoquinone.

7 ized by simply increasing the equivalents of benzoquinone.

8 tion of conjugated ketene silyl acetals with benzoquinone.

9 oxidizes the latter to 5-chloro-2-hydroxy-p-benzoquinone.

10 limination and reoxidation of palladium with benzoquinone.

11 hol, hydroquinone, 1,2,4-benzenetriol, and p-benzoquinone.

12 duction of the hypothetical intermediate 1,4-benzoquinone.

13 nsitivity ( approximately 50% resistance) to benzoquinone.

14 ions and the electron affinities of o- and m-benzoquinone.

15 measured for benzil and 3,5-di-tert-butyl-o-benzoquinone.

16 arting materials, such as naphthalene or 1,4-benzoquinone.

17 ries of phenolic metabolites, especially 1,4-benzoquinone.

18 Bu3SnD, and pyridine.BD3 with 2,5-dichloro-p-benzoquinone.

19 yl functionality of in situ generated masked benzoquinones.

20 oduce corresponding (1,3-dioxolane-4-yl)-1,4-benzoquinones.

21 nols, and mixed chlorofluorobenzenes to form benzoquinones.

22 nthesized a series of 6-aryl-2,3-dihydro-1,4-benzoquinones.

23 4-n-Butylamino-5-ethyl-1,2-benzoquinone (1(ox)) has been synthesized as a model com

24 lating quinones, including unsubstituted 1,4-benzoquinone (1,4-BzQ) and partially substituted vitamin

25 tion of the explosive 2,3,5,6-tetraazido-1,4-benzoquinone, 14, produced by N3--induced hydrolysis of

26 )benzoquinone (DMDBBQ), and 2,6-dibromo-(1,4)benzoquinone (2,6-DBBQ) in some swimming pools at concen

27 10 swimming pools and found 2,6-dichloro-1,4-benzoquinone (2,6-DCBQ) in all the pools at concentratio

28 anthraquinone-2,7-disulfonic acid (AQDS)/1,2-benzoquinone-3,5-disulfonic acid (BQDS) RFBs.

29 crystal structures of fluorobenzene 50c and benzoquinone 54 inhibitors complexed with the TF/VIIa en

30 de DBMIB (2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone), a well-known inhibitor of photosynthetic

31 sitive to 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone, a cytochrome b6f complex inhibitor.

32 ed in the modular assembly of bis(indol-3-yl)benzoquinones, a significant natural product family.

33 Here, we screened an aziridinyl 1,4-benzoquinone (ABQ) library against the causative agents

34 For 2,3-diamino-1,4-benzoquinone, adiabatic E(T1) and E(S1) energies were cl

35 Ascorbate, glutathione, and 1,4-benzoquinone all reduce ferric TyrH, but much more slowl

36 A structurally close 1,4-benzoquinone analogue was also prepared.

37 dehalogenated by DHP to form 2,6-dibromo-1,4-benzoquinone and 2,6-dichloro-1,4-benzoquinone, respecti

38 re reported for two representative quinones, benzoquinone and 2-anthraquinonesulfonate, in buffered a

39 electron acceptors such as 2,6-dimethyl-1,4-benzoquinone and 5-hydroxy-1,4-naphthaquinone.

40 zoR2 confer resistance to catechol, MHQ, 1,4-benzoquinone and diamide.

41 r, autoxidation of DTBC to the corresponding benzoquinone and H2O2 was shown to be a key to the catal

42 The benzoquinone and hydroquinone redox couple was examined

43 The reactant and product, 1,4-benzoquinone and hydroquinone, are separated during the

44 ining phenolic or quinone group, such as 1,4-benzoquinone and hydroquinone, likely contributed to the

45 Conversely, EH(4) reduced 2,6-dimethyl-1,4-benzoquinone and molecular oxygen 90 and 40 times faster

46 the generation of the reactive intermediates benzoquinone and N-acetyl-p-benzoquinone imine, which ca

47 rimethyl-6-(12-hydroxy-5-10-dodecadiynyl-1,4-benzoquinone and N-benzyl-N-hydroxy-5-phenylpentamide fu

48 Benzoquinone and naphthoquinone analogues of the Ape1-in

49 lylation of unsubstituted or monosubstituted benzoquinone and naphthoquinone substrates.

50 certed electron-proton transfer reduction of benzoquinone and oxidation of hydroquinone, respectively

51 Non-redox cycling quinones, including benzoquinone and phenylquinone, were competitive inhibit

52 The molecular role of water, benzoquinone and phosphoric acid has been probed by comp

53 direct electron transfer reactions, while p-benzoquinone and terephthalic acid are not.

54 istration of N-acetyl-p-benzoquinoneimine, p-benzoquinone and the electrophilic TRPA1 activator cinna

55 At the same time, when 1,2-benzoquinone and ubiquinone are adsorbed on the electrod

56 quinone reductase activity with menadione or benzoquinone and weak activity with cytochrome c, molecu

57 thoxy-3-[(Z,Z)-8',11',14'-pentadecatriene]-p-benzoquinone) and its analogs.

58 an analyte concentration (e.g., 0.1-2.5 mM p-benzoquinone) and with an analyte feeding rate (i.e., a

59 otodeprotection process by the presence of p-benzoquinone, and absence of a labeled carbonyl final pr

60 g radicals ArO(*) and TEMPO, hydroquinone to benzoquinone, and dihydroanthracene to anthracene.

61 ed as voltammetric electrodes for ferrocene, benzoquinone, and tetracyanoquinodimethane electrochemis

62 tegy to halt neurodegenerative diseases, and benzoquinone ansamycin (BQA) Hsp90 inhibitors such as ge

63 The increased duration of benzoquinone ansamycin exposure showed increased potency

64 The benzoquinone ansamycin geldanamycin and its derivatives

65 ective describes the influential role of the benzoquinone ansamycin geldanamycin and the resorcylic a

66 The benzoquinone ansamycins (BQAs) are a valuable class of a

67 olism of trans- and cis-amide isomers of the benzoquinone ansamycins and their mechanism of Hsp90 inh

68 which trans- rather than cis-amide forms of benzoquinone ansamycins are metabolized by NQO1 to hydro

69 Much attention is focused on the benzoquinone ansamycins as anticancer agents, with sever

70 es show that the reduction of this series of benzoquinone ansamycins by NQO1 generates the correspond

71 The reduction of these benzoquinone ansamycins by recombinant human NQO1 to the

72 o growth inhibition after treatment with the benzoquinone ansamycins compared with the MDA468 cells;

73 trans- but not the cis-amide isomers of the benzoquinone ansamycins could be accommodated by the NQO

74 The trans-cis isomerization of the benzoquinone ansamycins in Hsp90 inhibition has been dis

75 The benzoquinone ansamycins inhibit the ATPase activity of t

76 both the trans- and cis-amide isomers of the benzoquinone ansamycins into the open Hsp90 structure.

77 ition of purified human Hsp90 by a series of benzoquinone ansamycins was examined in the presence and

78 itors of HSP90 ATPase activity including the benzoquinone ansamycins, geldanamycin and 17-allylamino-

79 e report an extensive study with a series of benzoquinone ansamycins, which includes gel-danamycin, 1

80 We describe the preparation of potent non-benzoquinone ansamycins.

81 ion energies compared with the corresponding benzoquinone ansamycins.

82 The benzoquinone ansamysin 17-allylamino-17-demethoxygeldana

83 The cellular consequences of 1,4-benzoquinone are consistent with those of topoisomerase

84 Macrocyclic metal complexes and p-benzoquinones are commonly used as co-catalytic redox me

85 ation of amyl alcohol to pentanal; using 1,4-benzoquinone as a cocatalyst, the conversion was faster.

86 zyme microassay for glucose oxidase with 1,4-benzoquinone as an acceptor of electrons.

87 henols using [PdCl2(CH3CN)2] as catalyst and benzoquinone as an oxidant.

88 h the enzymatic oxidation of lactose using p-benzoquinone as electron acceptor and the electrochemica

89 eriments using stoichiometric amounts of 1,4-benzoquinone as oxidant.

90 sms of p-nitrophenol, p-methoxyphenol, and p-benzoquinone at a porous Ti4O7 reactive electrochemical

91 ules out dimerization with a series of alkyl-benzoquinones because the anomalous features get larger

92 The benzoquinone binds within 4.0 A of the flavin si face, c

93 of H2Q and the one-electron reduction of 1,4-benzoquinone (BQ) also reacts rapidly with Cu(II) and Cu

94 2, using [Pd(OAc)(2)](3) as the precatalyst, benzoquinone (BQ) as the stoichiometric oxidant, and a m

95 yields than systems employing stoichiometric benzoquinone (BQ) as the terminal oxidant.

96 direct Pd-catalyzed C-H functionalization of benzoquinone (BQ) can be controlled to give either mono-

97 The inclusion of benzoquinone (BQ) equidistant between the TiO2 and CdS t

98 e involvement of two mechanisms by which 1,4-benzoquinone (BQ) induces the decay of the excited state

99 ges of ferrocenemethanol (FcMeOH) oxidation, benzoquinone (BQ) reduction, and the formic acid oxidati

100 th respect to a small-molecule photooxidant, benzoquinone (BQ), because less dense organic adlayers a

101 G mixture via a 1,4-addition reaction with p-benzoquinone (BQ), followed by enzymatic kinetic measure

102 droquinone (HQ) and its oxidized counterpart benzoquinone (BQ).

103 ation to the corresponding electrophilic 1,4-benzoquinones (BQ).

104 nsation of butanedione into 4,5-dimethyl-1,2-benzoquinone but also its conversion into 4,5-dimethyl-1

105 inhibitor 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone but this induction requires the presence of

106 ss-resistance was found with other ansamycin benzoquinones but not with the structurally unrelated HS

107 Additivity was found to work well for m-benzoquinone, but BDE1 and BDE2 for 1,2- and 1,4-dihydro

108 tabolites N-acetyl-p-benzoquinoneimine and p-benzoquinone, but not acetaminophen itself, activate mou

109 NADH-dependent reduction of 2,6-dimethyl-1,4-benzoquinone by NADP+ (Ki approximately 6 nm) and 2'-pho

110 Hydroquinone is oxidized into benzoquinone by the HRP/H2O2 catalytic system.

111 col for the synthesis of protected amino-1,4-benzoquinones by oxidation of the corresponding 2,5-dime

112 amount of chloranil (2,3,5,6-tetrachloro-1,4-benzoquinone, CA) as the sensitizer.

113 Molecular oxygen and 1,4-benzoquinone can serve as electron acceptors during the

114 ansformation of p-nitrophenol to hydroxy-1,4-benzoquinone, catalyzed by NpdA2.

115 tion product, 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone (chloranilic acid).

116 hod is developed for in situ generation of a benzoquinone chromophore in the dyad using an iso-butyry

117 ate O2 reduction and generate the reactive p-benzoquinone co-catalyst.

118 imethoxy-5-methyl-6-(3-methyl-2-butenyl)-1,4-benzoquinone (coenzyme Q1) as a surrogate for coenzyme Q

119 The isoprenoid benzoquinone conjugates plastoquinone and ubiquinone wer

120 gment found in ubiquinone, 2,3-dimethoxy-1,4-benzoquinone, coupled to a boron-dipyrromethene (BODIPY)

121 uction of the additive 2,5-di-tert-butyl-1,4-benzoquinone (DBBQ) promotes solution phase formation of

122 4-benzoquinone (DCMBQ), and 2,6-dichloro-1,4-benzoquinone (DBBQ), were treated using a modified bench

123 ,4-benzoquinone (DCMBQ), and 2,6-dibromo-1,4-benzoquinone (DBBQ).

124 (-), Br(-), or I(-)), while dibromo-dimethyl-benzoquinone (DBDMBQ) showed only the transition of M(-*

125 erivative 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB), a known inhibitor of the bc1 and b

126 ne analog 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB), and the oxidized form of DBMIB, bu

127 ne analog 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB).

128 mples containing four HBQs, 2,6-dichloro-1,4-benzoquinone (DCBQ), 2,3,6-trichloro-1,4-benzoquinone (T

129 on potential (FP) tests for 2,6-dichloro-1,4-benzoquinone (DCBQ), 2,3,6-trichloro-1,4-benzoquinone (T

130 r halobenzoquinones (HBQs), 2,6-dichloro-1,4-benzoquinone (DCBQ), 2,6-dichloro-3-methyl-1,4-benzoquin

131 nzoquinone (DCBQ), 2,6-dichloro-3-methyl-1,4-benzoquinone (DCMBQ), 2,3,6-trichloro-1,4-benzoquinone (

132 , such as TriCBQ, 2,6-dichloro-3-methyl-(1,4)benzoquinone (DCMBQ), and 2,3,5,6-tetrabromo-(1,4)benzoq

133 nzoquinone (TCBQ), 2,6-dichloro-3-methyl-1,4-benzoquinone (DCMBQ), and 2,6-dibromo-1,4-benzoquinone (

134 nzoquinone (TCBQ), 2,6-dichloro-3-methyl-1,4-benzoquinone (DCMBQ), and 2,6-dichloro-1,4-benzoquinone

135 combination of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and beta-pinene permits the removal o

136 e abstractions by 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) from 13 C-H hydride donors (acyclic 1

137 oxidation with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) generates a mixture of products, incl

138 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) is a highly effective reagent for pro

139 ct quickly with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) to form persistent aromatic oxocarben

140 Reactions of 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) with silyl enol ethers, silyl ketene

141 ived heats of hydrogenation of o-, m-, and p-benzoquinone (Delta(hyd)H degrees (1o, 1m, and 1p) = 42.

142 none (RH1) is a novel antitumor diaziridinyl benzoquinone derivative designed to be bioactivated by t

143 A series of 2-(quinazolin-4-ylamino)-[1,4] benzoquinone derivatives that function as potent covalen

144 eaction, as two of them, 2,5-dihydroxy-[1,4]-benzoquinone (DHBQ) and 1,4,5,8-naphthalenetetrone, are

145 2,5-Dihydroxy-1,4-benzoquinone (DHBQ) is one of the key chromophores forme

146 2,5-Dihydroxy-1,4-benzoquinone (DHBQ) is one of the key chromophores occur

147 effect of different additives (including 1,4-benzoquinone, diphenylsulfoxide, tetramethylethylene, an

148 none (TriCBQ), 2,3-dibromo-5,6-dimethyl-(1,4)benzoquinone (DMDBBQ), and 2,6-dibromo-(1,4)benzoquinone

149 t increases except 2,3-dimethyl-6-phytyl-1,4-benzoquinone (DMPBQ) in vte1 and beta-tocopherol in Col.

150 he accumulation of 2,3-dimethyl-6-phytyl-1,4-benzoquinone (DMPBQ), a TC substrate.

151 thway intermediate 2,3-dimethyl-5-phytyl-1,4-benzoquinone (DMPBQ); and vte2, which lacks all tocopher

152 ols (p-X-DTBPs) afford 2,6-di-tert-butyl-1,4-benzoquinone (DTBQ) in up to 50% yields.

153 ly gave a monoalkylated 1,4-hydroquinone/1,4-benzoquinone electron donor-acceptor complex.

154 s terminated with either dimethoxybenzene or benzoquinone end-groups were prepared by a combined dive

155 chlorobenzoic acid, terephthalic acid, and p-benzoquinone) for use in EAOPs.

156 he reduced hydroquinone form to the oxidized benzoquinone form by the delivery of an oxidant by DPN.

157 While the benzoquinone form is susceptible to nucleophilic attack

158 nucleophile, which will react only where the benzoquinone form persists on the surface.

159 tion of previously reported 4,5-dimethyl-1,2-benzoquinone from 2,3-butanedione/amino acid model syste

160 Reduction of benzoquinone gave rise to positive feedback between the

161 y and the distance between the porphyrin and benzoquinone groups as calculated by semiempirical (AM1)

162 ing was in good agreement with the number of benzoquinone groups at the dendrimer periphery and the d

163 yl systems, as their enamine tautomers, with benzoquinone has been applied to a wide range of such im

164 While 1,4-benzoquinone has been shown to inhibit topoisomerase II

165 Diels-Alder adduct of cyclopentadiene and p-benzoquinone, has been devised.

166 der adducts of cyclopentadiene and 2-allyl-p-benzoquinone, has been devised.

167 Benzoquinone/hydroquinone redox interconversion by the r

168 verted to the reactive metabolite N-acetyl-p-benzoquinone-imide (NAPQI) (r= 0.739;P= 0.058).

169 r the synthesis of 1,4-benzoxazinones from o-benzoquinone imides and ketene enolates is reported.

170 hat the acetaminophen metabolite, N-acetyl-p-benzoquinone imine (NAPQI), covalently binds to the acti

171 e APAP to the reactive metabolite N-acetyl-p-benzoquinone imine (NAPQI).

172 oduction of its toxic metabolite, N-acetyl-p-benzoquinone imine (NAPQI).

173 o-electron process where 4-AP is oxidized to benzoquinone imine and O2 is reduced to H2O2.

174 The reactive metabolite N-acetyl-p-benzoquinone imine has long been proven to be responsibl

175 ation and reduced accumulation of N-acetyl-p-benzoquinone imine, a toxic electrophile that is produce

176 enging of the reactive metabolite N-acetyl-p-benzoquinone imine, protective mechanisms at later times

177 ve intermediates benzoquinone and N-acetyl-p-benzoquinone imine, which can subsequently react with nu

178 acetaminophen to highly reactive N-acetyl-p-benzoquinone imine.

179 y convert 1 equiv of TCP to 2,6-dichloro-1,4-benzoquinone, implicating the role of multiple ferryl [F

180 henol (TCP) is converted to 2,6-dichloro-1,4-benzoquinone in a H2O2-dependent process.

181 The Diels-Alder reaction between 5 and p-benzoquinone in boiling glacial acetic acid yields an un

182 trimethylphenyl)phosphine with a substituted benzoquinone in the presence of a chiral phosphapalladac

183 tly, this mechanism explains the key role of benzoquinone in these transformations; in addition, it p

184 ze the oxidation of various hydroquinones to benzoquinones in the presence of t-BuOOH.

185 errocene, DMFc is decamethylferrocene, BQ is benzoquinone) in CH2Cl2.

186 1,4-Benzoquinone increased topoisomerase II-mediated DNA cle

187 ing hydroxy-1,4-benzoquinone or 1,2- and 1,4-benzoquinone intermediates, respectively.

188 -sGDH anodes in the presence of 1,2- and 1,4-benzoquinones introduced in the solution is due to the s

189 oxidation of N-protected allylic amines with benzoquinone is achieved in tBuOH under ambient conditio

190 It was also hypothesized that when 1,4-benzoquinone is adsorbed on a carbon support, it would p

191 The benzoquinone is electrochemically reduced, resulting in

192 In turn, benzoquinone is electroreduced into hydroquinone at the

193 nched allylic acetate trans-vinylsilane when benzoquinone is employed.

194 Hydroxy-1,4-benzoquinone is reduced to hydroxyquinol, which is degra

195 ting with ChOx in chitosan cross-linked with benzoquinone is simple, mechanically robust and provides

196 recent developments in the chemistry of 1,2-benzoquinones is presented in this tutorial review.

197 ng of aromatic aldehydes (or alcohols) and p-benzoquinone led to an ester in the presence of the Cu(I

198 1,4-bis(4-bromophenyl)-1,3-butadiene and 1,4-benzoquinone led to the formation of a key intermediate

199 idging ligand 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone (LH2) with Fe(II) affords the solid (Me2NH2

200 2,5-di(2,6-dimethylanilino)-3,6-dibromo-1,4-benzoquinone (LH2) with Fe(II) in the presence of the ca

201 GE, a 3-azido-2-methyl-5-methoxy-6-decyl-1,4-benzoquinone-linked peptide, with a retention time of 41

202 d), but a value of about 10 kJ mol(-1) for p-benzoquinone loss, which is consistent with formation of

203 A benzoquinone-masked primary amine is attached to this su

204 (NIPE) spectra of the radical anion of meta-benzoquinone (MBQ, m-OC6H4O) have been obtained at 20 K,

205 molecular Diels-Alder reaction of a masked o-benzoquinone (MOB) 9 and an aqueous acid-catalyzed intra

206 rophenol (6M2NP), (4.4 +/- 0.3) % methyl-1,4-benzoquinone (MQUIN) and (77.2 +/- 6.3) % HNO3.

207 w report that BQ and 2-(N-acetylcystein-S-yl)benzoquinone (NAC-BQ) preferentially bind to solvent-exp

208 hetero-Diels-Alder reactions, tetrafluoro-o-benzoquinone (o-fluoranil) undergoes nucleophilic additi

209 Q) from TCBQ, and 3-hydroxyl-2,6-dibromo-1,4-benzoquinone (OH-DBBQ) from DBBQ.

210 re identified as 3-hydroxyl-2,6-dichloro-1,4-benzoquinone (OH-DCBQ) from DCBQ, 5-hydroxyl-2,6-dichlor

211 m DCBQ, 5-hydroxyl-2,6-dichloro-3-methyl-1,4-benzoquinone (OH-DCMBQ) from DCMBQ, 5-hydroxyl-2,3,6-tri

212 ) from DCMBQ, 5-hydroxyl-2,3,6-trichloro-1,4-benzoquinone (OH-TCBQ) from TCBQ, and 3-hydroxyl-2,6-dib

213 sformation products of HBQs as halo-hydroxyl-benzoquinones (OH-HBQs) in water under realistic conditi

214 the influence of two quinones (1,2- and 1,4-benzoquinone) on the operation and mechanism of electron

215 nooxygenation pathways involving hydroxy-1,4-benzoquinone or 1,2- and 1,4-benzoquinone intermediates,

216 The enzymes did not use GS-benzoquinones or other thiol-hydroquinones, for example,

217 ieved with either an oxidative quencher (1,4-benzoquinone) or a reductive quencher (N,N,N',N'-tetrame

218 with either DDQ (2,3-dichloro-5,6-dicyano-p-benzoquinone) or TBHP (tert-butyl hydroperoxide), along

219 The EGB, obtained when electrolysis of p-benzoquinone, or 1,4-naphthoquinone, is carried out at t

220 dihydroxybenzoquinone, dichloro-dihydroxy-p-benzoquinone, or benzene decorated by -COOH groups exhib

221 iisopropyl-6-oxoverdazyl) was synthesized by benzoquinone oxidation of the corresponding bis(tetrazan

222 milarly reduces Fe(III)~CO(2), and TEMPO and benzoquinone oxidize Fe(II)~CO(2)H to return to Fe(III)~

223 ction of organic compounds (p-nitrophenol, p-benzoquinone, p-methoxyphenol, and oxalic acid) and curr

224 nd formation involves a stacked hydroquinone-benzoquinone pair that can be trapped on DsbB as a quinh

225 er secondary (15)N-AKIEs associated with the benzoquinone pathway.

226 etabolite of the human carcinogen benzene, p-benzoquinone (pBQ).

227 ctrophilic arthropod defensive compound para-benzoquinone (pBQN) on the human TRPA1 channel.

228 , 2-pyrrolidino-substituted 3,6-dimethyl-1,4-benzoquinones photocyclize to give benzoxazolines with q

229 om cubic to orthorhombic, while usage of 1,4-benzoquinone preserves the cubic phase of CsPbI3 QD.

230 matization with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone produced the functionalized [12]CPPs.

231 Oosporein, a red-pigmented benzoquinone, produced by many fungal insect pathogenic

232 dition of arylsulfinic acids to 2-methyl-1,4-benzoquinone provides high yields of sulfones in a wide

233 he use of PhI(OAc)(2) as oxidant in place of benzoquinone provides the branched, cis-vinylsilane as t

234 e presence of the aqueous hydroquinone (H2Q)/benzoquinone (Q) couple in a flowing suspension of carbo

235 The kinetics of reduction of benzoquinone (Q) to hydroquinone (H(2)Q) by the Os(IV) h

236 formation by rapidly oxidizing Q(*-) to form benzoquinone (Q).

237 tive sacrificial reactions with 4-methyl-1,2-benzoquinone, quantifying products and ratios by HPLC-UV

238 adamantane, trimethylamine n-oxide, and 1,4-benzoquinone quantitatively producing 3 as the Pd-contai

239 onsider the intrinsic properties of the para-benzoquinone radical anion, which serves as the prototyp

240 droquinones can be spontaneously formed from benzoquinones reacting with reduced GSH via Michael addi

241 In contrast, the slower benzoquinone reaction forms ethane by a different pathwa

242 mediate, derived by tautomerization of a bis-benzoquinone, readily accessed from two simple phenolic

243 l theory (DFT) calculations indicated that p-benzoquinone removal was primarily due to reaction with

244 ibromo-1,4-benzoquinone and 2,6-dichloro-1,4-benzoquinone, respectively.

245 lurea and 5-dibromo-6-isopropyl-3-methyl-1,4-benzoquinone resulted in a disturbance of Dd+Dt synthesi

246 -Diaziridinyl-3-(hydroxymethyl)-6-methyl-1,4-benzoquinone (RH1) is a novel antitumor diaziridinyl ben

247 active lipid composed of a fully substituted benzoquinone ring and a polyisoprenoid tail and is requi

248 e electron carriers formed of a redox active benzoquinone ring attached to a prenyl side chain.

249 is an aromatic ring precursor that forms the benzoquinone ring of Q and is used extensively to examin

250 analysis using antiserum raised against the benzoquinone ring structure of ubiquinone (anti-Q).

251 ity of the ligand shell to alkyl-substituted benzoquinones (s-BQs), as measured by a decrease in the

252 )(1), respectively, indicating that o- and p-benzoquinone should be excellent radical traps.

253 molecule 2,5-dihydroxy-3-(1H-indol-3-yl)[1,4]benzoquinone show interesting and consistent trends iden

254 es, producing phytotoxins such as the potent benzoquinone sorgoleone (2-hydroxy-5-methoxy-3-[(Z,Z)-8'

255 ies, producing phytotoxins such as the lipid benzoquinone sorgoleone, which likely accounts for many

256 Here we demonstrate that several benzoquinones spontaneously reacted with GSH to form GS-

257 Finally, 1,4-benzoquinone stimulated DNA cleavage by topoisomerase II

258 1,4-benzoquinone (DCBQ), 2,3,6-trichloro-1,4-benzoquinone (TCBQ), 2,6-dichloro-3-methyl-1,4-benzoquin

259 1,4-benzoquinone (DCBQ), 2,3,6-trichloro-1,4-benzoquinone (TCBQ), 2,6-dichloro-3-methyl-1,4-benzoquin

260 ,4-benzoquinone (DCMBQ), 2,3,6-trichloro-1,4-benzoquinone (TCBQ), and 2,6-dibromobenzoquinone (DBBQ),

261 facile two-step method using tetrachloro-1,4-benzoquinone (TCBQ, p-chloranil), accompanied by a two-s

262 quinone (DCMBQ), and 2,3,5,6-tetrabromo-(1,4)benzoquinone (TetraB-1,4-BQ).

263 , beta-dehydrogenated derivatives of nonyl-p-benzoquinones that originated by hydroxylation induced r

264 ed back to the formation of 4,5-dimethyl-1,2-benzoquinone through isotope labelling studies.

265 392 and Cys405 did not affect the ability of benzoquinone to block the N-terminal gate of topoisomera

266 n mechanism accounts for the ability of para-benzoquinone to capture and retain electrons.

267 of hydrazones in the presence of t-BuOLi and benzoquinone to form the corresponding branched dienes.

268 driven at the interface by the reduction of benzoquinone to hydroquinone and the resulting interfaci

269 t(4)N)(2) (4) reacts rapidly with TEMPO or p-benzoquinones to generate diferric and deprotonated [Fe(

270 enzymatic reactions led to the reduction of benzoquinones to hydroquinones with the concomitant oxid

271 We also identified 2,3,6-trichloro-(1,4)benzoquinone (TriCBQ), 2,3-dibromo-5,6-dimethyl-(1,4)ben

272 a Ca(2+) mitochondrial regulator similar to benzoquinone-ubiquinones like Ub0.

273 thylene-2,3-dihydrofuran with 2 equiv of 1,4-benzoquinone unexpectedly gave a monoalkylated 1,4-hydro

274 oquinone (DQ) and 2,3-dimethoxy-5-methyl-1,4-benzoquinone (UQ(0)), the quinone concentration and solv

275 similar to ubiquinone (Q), a polyprenylated benzoquinone used in the aerobic respiratory chain.

276 iquinone (coenzyme Q or Q), a polyprenylated benzoquinone used in the aerobic respiratory chain.

277 oquinones back to hydroquinones and reducing benzoquinones via spontaneous formation of GS-hydroquino

278 trast to previous reports, we found that 1,4-benzoquinone was a strong topoisomerase II poison and wa

279 (m)(NADH) was 19 +/- 1.7 microM and the K(m)(benzoquinone) was 37 +/- 3.6 microM.

280 m)(NADH) was 14 +/- 0.43 microM and the K(m)(benzoquinone) was 5.8 +/- 0.12 microM.

281 O.6DMF (LH2 = 2,5-dichloro-3,6-dihydroxo-1,4-benzoquinone) was previously shown to magnetically order

282 Radical anions of o-, m-, and p-benzoquinone were produced in a Fourier transform mass s

283 3-Amino-6-chloropyridazine and p-benzoquinone were responsible for the increased toxicity

284 Benzoquinones were experimentally explored as mediators

285 quinone as the substrate 2,3-disubstituted p-benzoquinones were isolated.

286 ing materials the 2,3,5,6-tetrasubstituted p-benzoquinones were isolated.

287 Highly substituted p-benzoquinones were obtained in yields ranging from 39% t

288 almost all cases the 2,3,5-trisubstituted p-benzoquinones were obtained.

289 BQs were further modified to monohalogenated benzoquinones when the UV dose was higher than 200 mJ cm

290 Q are auto-oxidized to toxic ortho- and para-benzoquinones which act like diamide as thiol-reactive e

291 xidase uses the hydrogen peroxide to produce benzoquinone, which forms a red quinone imine dye by a s

292 richlorophenol (2,4,5-TCP) to 2,5-dichloro-p-benzoquinone, which is chemically reduced to 2,5-dichlor

293 aC-lithiated O-silyl ethyl pyruvate oxime to benzoquinone, which is followed by an oxa-Michael ring-c

294 t was replaced by 2,3-dichloro-5,6-dicyano-p-benzoquinone, which is frequently used at the oxidizing

295 Our findings suggest that hydroquinones and benzoquinones, which are interchangeable via redox equil

296 oheptene-1,2-diol, 4, from the reaction of o-benzoquinone with reduced elemental sulfur, H2Sx.

297 n reaction buffers and the incubation of 1,4-benzoquinone with the enzyme prior to the addition of DN

298 6,7-disubstituted-quinazolin-4-ylamino)-[1,4]benzoquinones with various amines, anilines, phenols, an

299 oxygen oxidized to the corresponding nonyl-p-benzoquinones-yielding a complex mixture of potentially

300 first structurally rigid zinc phthalocyanine-benzoquinone (ZnPc-BQ) dyad as a model for photoinduced