1 -Phenyl-1,2-bis

Synthesis and Properties. A number of monomers have been used to prepare PQs and PPQs, including aromatic bis((9-diamines) and tetramines, aromatic bis(a-dicarbonyl) monomers (bisglyoxals), bis(phenyl-a-diketones) and a-ketones, bis(phenyl-a-diketones) containing amide, imide, and ester groups between the a-diketones. Significant problems encountered are that the tetraamines are carcinogenic, difficult to purify, and have poor stabihty, and the bisglyoxals require an arduous synthesis. 

Pigment Blue 19 [58569-23-6] 42750 triarylcarbonium sulfonate sulfonation of bis (/-phenyl aminopheny1)-3-methy1-4-aminoph enylcarbonium sulfate... 

Dibenz[c 1c ]azepine (32 a) is obtained by acid-mediated cyclization of 2 -(aminomethyl)bi-phenyl-2-carbaldehyde (31 a), which is generated in situ by reduction of the oxime acetal 30a.85 The acetyl 30 a and benzoyl 30c oximes behave similarly and give the dimethyl and diphenyl derivative 32 b and 32 c, respectively. 

Chemoselective alkenylation in the C-3 position of N-substituted 3,5-dichloropyrazin-2(lH)-ones has been described by Van der Eycken et al. [27]. When a mixture of N-substituted 3,5-dichloropyrazin-2(lH)-one, ethyl acrylate, and NEts in DME, using Pd(OAc)2/DTPB [2-(di-f-butylphosphanyl)bi-phenyl] as a precatalyst, was irradiated for 15 min at 150 °C, the desired /1-fimctionabzed ethyl acrylates could be obtained in moderate yields (Scheme 81). When styrene was used as an alkene, a mixture of E and Z products was isolated. The type of catalyst used proved to be important to avoid competitive Diels-Alder reaction of ethyl acrylate with the hetero-diene system of 3,5-dichloro-l-benzylpyrazin-2(lH)-one. 

The reaction of crotonaldehyde and methyl vinyl ketone with thiophenol in the presence of anhydrous hydrogen chloride effects conjugate addition of thiophenol as well as acetal formation. The resulting j3-phenylthio thioacetals are converted to 1-phenylthio-and 2-phenylthio-1,3-butadiene, respectively, upon reaction with 2 equivalents of copper(I) trifluoromethanesulfonate (Table I). The copper(I)-induced heterolysis of carbon-sulfur bonds has also been used to effect pinacol-type rearrangements of bis(phenyl-thio)methyl carbinols. Thus the addition of bis(phenyl-thio)methyllithium to ketones and aldehydes followed by copper(I)-induced rearrangement results in a one-carbon ring expansion or chain-insertion transformation which gives a-phenylthio ketones. Monothioketals of 1,4-diketones are cyclized to 2,5-disubstituted furans by the action of copper(I) trifluoromethanesulfonate. ... 

Segmented poly(ether urethanes) were synthesized from polypropylene glycol (PPG) and 4,4 methylene-bis(phenyl-isocyanate) (MDI), using l,l -bis(B-aminoethyl)ferrocene (1) and 1,1 -bis(B-hydroxyethyl)-ferrocene (2) as chain extenders. 

Triazenido ligands can exhibit various coordination modes, and they can also act as a bridge spanning two Ni11 ions. A representative example is complex (849), where three l,2-bis(phenyl-triazenido)benzene ligands encapsulate a Ni(/x-OI I)2Ni core.206... 

Phenylheptanoate 9-Phenylnonanoate 11-Phenyldecanoate 9-Tolylnonanoate 5-(4-tolyl)valerate bi-phenyl) valerate pentanoate or 6-phenylhexanoate or 7-ph enylh eptano ate or 9-phenylnonanoate or 11-phenyldecano-ate... 

Phenylquinoxalines - Polyphenylquinoxalines (PPQ) prepared from the reaction of aromatic bi s (o-di amines) and aromatic bis (phenyl-ot-diketones) are high temperature thermoplastics. They are process-able with little or no volatile evolution at relatively high temperatures (> 316°C) and pressure (-1.38 MPa) by virtue of their thermoplasticity. Like other thermoplastics, the processability is governed primarily by the chemical structure, molecular weight and molecular weight distribution. 

Cyanamide and its aromatic derivative, such as 4,4 -methylene bis(phenyl cyanamide), were reported to cure an epoxy resin at elevated temperatures.(4) It is also well known that the dimer of cyanamide (dicyandiamide) is the most important epoxy curing agent in one-package epoxy compounding.(5) Unfortunately, this dimer precipitates from the dispersion causing uneven mixing upon standing. 

Figure 4.4 The molecular structure of iridium(lll) kN,C,N-bis(phenyl)isophthalaldimin-2-yl dibromide-MeCN (0.5 H2O) (71a).

This enzyme [EC 1.13.11.39], also referred to as bi-phenyl-2,3-diol 1,2-dioxygenase, catalyzes the reaction of biphenyl-2,3-diol with dioxygen to produce 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate and water. The enzyme can also use 3-isopropylcatechol as a substrate, forming 7-methyl-2-hydroxy-6-oxoocta-2,4-dienoate as a product. This protein is not identical with catechol 2,3-dioxygenase. 

Im Gegensatz hierzu kuppelt Leuchtkafer-Luciferin mit diazotiertem 4,4 -Diamino-bi-phenyl (Benzidin) in 6-Stellung2 ... 

Ethyleneglycol Diphenylether or Di(phenyloxy). ethylene. See Bis(phenyl)-ethyleneglycol Ether in Vol 2 of Encycl, p B153-R. Its Bis ... 

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