Benzo phenols

Naphthalene) bisbenzimidazole Imide Single Tg FTIR II was made from 1,4-phenylene and 3,3, 4,4 -benzo-phenolic dianhydride Kao and Chen (1997)... 

Wada and coworkers have recently prepared a number of very similar systems in which the bridging chain is bonded to the benzo group by oxygen . The phenolic ox-... 

Solids. —It may Idc a hydrocM bon (c .g., paraffin wa, naphthalene) highei alcohol eg., cetyl alcohol) aldehyde e.g., z5-hydroxybenzaldehyde) ketone and qiiinonc e.g., benzo-phenone, camphor) acid (higher fatty, e.g., palmitic acid or aromatic acid) ester (of glycerol, phenols or aromatic alcohols) phenol e.g., thymol),... 

Benzo persaure,/. peroxybenzoic acid, perben-zoic acid. phenol, n, phenol (CaHeOH), schwarzblau, n, benzo black-blue, benzoylieren, v.t. benzoylate, introduce benzoyl into. 

Trichlormethyl-phenyl-sulfanund4-Acetoxy-l-methylthio-benzo] lassensichin 100bzw. 86%iger Ausbeute durch Methanol/Amberlyt 15 zu Thiophenol bzw. 4-Mercapto-phenol reduzieren3 ... 

By introducing reasonable values (about 2 for nitrogen, 4 for oxygen) for the electron affinity parameter relative to carbon, 8, and for the induced electron affinity for adjacent atoms (32/8i = Vio), we have shown that the calculated permanent charge distributions for pyridine, toluene, phenyltrimethylammonium ion, nitrobenzene, benzoic acid, benzaldehyde, acetophenone, benzo-nitrile, furan, thiophene, pyrrole, aniline, and phenol can be satisfactorily correlated qualitatively with the observed positions and rates of substitution. For naphthalene and the halogen benzenes this calculation does not lead to results... 

Irreversible reaction of [18] iodine with acetylsalicylic acid, aethaverine, amidopyrine, ascorbic acid, benzo-caine, quinine, dihydrocodeine, fluorescein, glycine, hydrocortisone acetate, isoni-azid, metamizole, papaverine, paracetamol, phenacetin, phenol-phthalein, piperazine, resorcinol, salicylic acid, salicylamide, sulfaguanidine, thymol, triethanolamine, tris buffer detection by reaction chromatography... 

Chlorinated dibenzo ip-dioxins are contaminants of phenol-based pesticides and may enter the environment where they are subject to the action of sunlight. Rate measurements showed that 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is more rapidly photolyzed in methanol than octachlorodi-benzo-p-dioxin. Initially TCDD yields 2,3,7-trichlorodiben-zo-p-dioxin, and subsequent reductive dechlorination is accompanied by ring fission. Pure dibenzo-p-dioxin gave polymeric material and some 2,2 -dihydroxybiphenyl on irradiation. Riboflavin-sensitized photolysis of the potential precursors of dioxins, 2,4-dichlorophenol and 2,4,5-trichloro-phenol, in water gave no detectable dioxins. The products identified were chlorinated phenoxyphenols and dihydroxy-biphenyls. In contrast, aqueous alkaline solutions of purified pentachlorophenol gave traces of octachlorodibenzo-p-dioxin on irradiation. 

The transformation of benzene, toluene, naphthalene, biphenyl, and benzo[a]pyrene to the corresponding phenols (Trower et al. 1989) by Streptomyces griseus, and of phenanthrene by Streptomyces flavovirens to ( )tran5 -[95, 105 ]-9,10-dihydrodihydroxyphenanthrene with minor amounts of 9-hydroxyphenanthrene (Sutherland et al. 1990). 

XAD2 tube Benzo(a)pyrene, Fluoranthene, Naphtalene Halothane Phenol... 

Oxidation of the o-QM complex 13 (formed by treating the phenol complex with (R)-citronellal and pyridine) with CAN resulted in an intramolecular Diels-Alder reaction to form the benzo[c]chromene 15 (Scheme 3.8). 

A Friedel-Crafts-type reaction of phenols under basic conditions is also possible. Aqueous alkaline phenol-aldehyde condensation is the reaction for generating phenol-formaldehyde resin.34 The condensation of phenol with glyoxylic acid in alkaline solution by using aqueous glyoxylic acid generates 4-hydroxyphenylacetic acid. The use of tetraalkylammonium hydroxide instead of sodium hydroxide increases the para-selectivity of the condensation.35 Base-catalyzed formation of benzo[b]furano[60]- and -[70]fullerenes occurred via the reaction of C60CI6 with phenol in the presence of aqueous KOH and under nitrogen.36... 

Lead tetraacetate oxidation was applied to construct a benzo[c]-phenanthridine skeleton. The Hofmann degradation product 224 derived from the phenolic protoberberine 59a was oxidized with lead tetraacetate to afford the p-quinol acetate 225, which was cyclized to the benzo[c]-... 

The highly potent anti-HIV natural product daurichromenic acid (10-100) was synthesized by Jin and coworkers [36] using a microwave-assisted reaction of the phenol derivative 10-97 and the aldehyde 10-98 (Scheme 10.25). Normal heating gave the desired benzo[b]pyran 10-99 by a domino condensation/intramolecular SN2 -type cyclization reaction only in low yield. However, when the reaction mixture was irradiated twenty times in a microwave for 1-min intervals, 10-99 was obtained in 60% yield. This compound was then transformed into 10-100 by cleavage of the ester moiety. 

Owing to the fact that ethyl ethers are especially effective substrates for CYP1A1 [184], the probe possesses an ethyl group on the phenolic oxygen of the trimethyl lock. In vitro, fluorescence was manifested by CYP1A1 isozyme with Kcat/KM 8.8 x 103 M-1s 1 and KM 0.09 pM. In cellulo, the probe revealed the induction of cytochrome P450 activity by the carcinogen 2,3,7,8-tetrachlorodi-benzo-p-dioxin (TCDD), and its repression by the chemoprotectant resveratrol. 

Triazolopyranopyrimidines can be prepared from the phenol-substituted triazolopyrimidines. Condensation with an aldehyde with the fused dihydropyrimidine such as 181 is followed by cyclization to give benzo-fused trihetero-cyclic compounds 182 (Equation 48) <1996CHE215>. 

Phenolic resins are mainly composed of aromatic esters benzoe and storax were the most common in the Mediterranean [86]. 

A series of benzo[fc]benzo[2,3-cfjthiophen-6,9-diones 12 has been prepared in modest yields by palladium mediated cyclization of the precursors 13. However, the necessity to use stoichiometric amounts of the palladium source precludes cost effective preparation of the targets. The required substrates 13 may be constructed by palladium catalyzed reactions between the appropriate phenols with 2,3-dimethylbenzoquinone <06SC3319>. 

The thermal decomposition of />-nitrotriphenylmethyl hydroperoxide in benzene gives -nitrophenol 32%, phenol 9%, >-nitro-triphenylcarbinol 23%, -nitrobenzophenone 14%, and no benzo-phenone the decomposition in ether plus sulfuric acid gives -nitro-benzophenone 94% and phenol 81%.817 The latter reaction is very probably ... 

Fig. 10 Composition and spatial distribution of the main patterns of contamination identified in sediment of the Ebro River basin from year 2004 to 2006. Different temporal distribution of the PAHs pattern of contamination over the territory and constant distribution in time of the APs and heavier PAHs as well as the OCs pattern. Big circles representing higher levels of pattern contribution than small circles. Variables identification 1, naphthalene 2, acenaphtylene 3, acenapthene 4, fluorene 5, phenanthrene 6, anthracene 7, fluoranthene 8, pyrene 9, benzo(a) anthracene 10, chrysene 11, benzo(b)fluoranthene 12, benzo(k)fluoranthene 13, benzo(a)pyr-ene 14, indeno(l,2,3-cd)pyrene 15, dibenzo(a,h)anthracene 16, benzo(g,h,i)perylene 17, octyl-phenol 18, nonylphenol 19, tributylphosphate 20, a-HCH 21, HCB 22,2,4-DDE 23,4,4-DDE 24, 2,4-DDD 25, 4,4-DDD 26, 2,4-DDT 27, 4,4-DDT...

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