Phenoxy, 2,4,6-triphenyl

According to Kanter the reaction sequence 164 to 169, i carried out in the presence of trifluoroacetic acid and thiophenol with the careful exclusion of oxygen, leads to a 40% yield of l-dimethylamino-l-phenoxy-2.4.6-triphenyl- -... 

Most of the light yellow to yellowish-green colored 2.4.6-aryl-substituted X -phos-phorins fluoresce strongly. This phenomenon is an excellent aid in tracing X-phosphorins in preparative work. l.l-Bis-[4-nitro-phenoxy-] 2.4.6-triphenyl-XS-phosphorin and the l.l-dialkylthio-2.4.6-triphenyl-X -phosphorins do not fluorescence. 

That this oxidation leads to the radical cation 55 and not to a X -phosphorin-oxide radical 59 was evidenced by the observation that labelled triphenyl-phenoxy radicals do not lead to any coupling pattern, but rather to precisely the same ESR spectrum as before. Nevertheless, the possibility of an equilibrium with the neutral radical 5P cannot be excluded with certainty since the coupling may be quite small and the P-coupling may not be changed very much. 

In the nucleophilic displacement reaction of l.l-bis-diethylamino-2.4.6-tri-phenyl-X -phosphorin with thiophenol, the l.l-diphenylthio-2.4.6-triphenyl-X -phosphorin 197 does not survive the reaction temperature only trace quantities are formed. Thiophenol in refluxing benzene is thus an excellent means of removing dialkylamino groups. Besides diphenyldisulfide and diethylamine, this procedure affords good yields of 2.4.6-triphenyl-X -phosphorin 22. 1-Phenoxy-l-di-ethylamino-2.4.6-triphenyl-X -phosphorin 176 (see p. 89) is formed as a side product ... 

Diethyl-(4-methoxy-methyl-anilino)- E2, 296 Diethyl-(N-methyl-anilino)- E2, 295, 296 Diethyl-phenoxy- El, 2SI Diethyl-phenyl- -phenylimid XU/1, 177 Difluor-difluormethyl- E2, 836, 854 Difluor-(fluorsulfonyl-methyl)- E2, 857 Difluor-methyl- E2, 836, 854 Difluor-phenyl- E2, 854 Difhior-trifluormethyl- E2, 905 Difluor-triphenyl- E2, 881 Diisopropyloxy-hexyl- El, 135 Diisopropyloxy-methyl- E2, 200, 480 Diisopropyloxy-phenyl- E2. 134, 135, 207 Diisopropyloxy-propyl- E2, 200 Dimcthoxy-methyl- E2, 480 Dimethoxy-phenyl- E2, 204ff, 207, 393, 856, 864 Dimethylamino-diphenyl- E2, 18, 227 Dimethylamino-ethinyl- E2, 230 Dimethylamino-fluor-trifluormethyl- E2, 435 (4-Dimethylamino-phenyl)-diphcnyl- E2, 108 (4-Dimcthylamino-phenyl)-diphcnyl- -(2-nitro-phenylthioimid) E2, 108 Dimethylamino-l-propinyl- E2, 230 (l,l-Dimethyl-butyloxy)-ethyl-methyl- E2, 20, Dimethyl-(diphenylmethylen-amino)- E2, 106 Dimethyl-fluor- E2, 161 Dimethyl-phenyl- E2, 99, 103 Dimethyl-phenyl- -(2-aminocarbonyl-hydrazinocar-bonylimid) E2, 113... 

Methyl-propyloxy- Xll/l, 323 (2-Methyl-propyloxy)-phenyl- XII/1, 322 E2,189 Methyl-triphenyl- E2, 66 Octyl- XII/1, 157, 293 Phenoxy-phenyl- XII/1, 321 E2,131 Phenyl-propyloxy- E2, 422 Phenyl-(2-triethylstannyl-ethyl)- E2,170 Phenyl-trimethylsilyloxy- El, 274 Propyloxy- E2, 181 Triallyl- XII/1, 159... 

Numerous other conversions of 5-(2,2 -bipyridyl)-3,3,7,7-tetramethyl-tran -5-nickelatri-cyclo[4.1.0.0 ]heptane (9) have been reported. Upon treatment with maleic anhydride, tetra-cyanoethene or triphenyl phosphite, 3,3,6,6-tetramethyl-trani -tricyclo[3.1.0.0 ]hexane was formed. With triphenyl phosphite, bi(2,2-dimethylcyclopropyl) and l-(2,2-dimethylcyclo-propyl)-3-methylbuta-l,3-diene were obtained as additional products. Similarly, bi(2,2-dimethylcyclopropyl) was obtained upon acidolysis of the metallacycle. The bicyclopropyl was also released with triethylaluminum. Reaction with phenol gave an intermediate complex 3-[2,2 -bipyridyl(phenoxy)nickela-l,T-bi(2,2 -dimethylcyclopropyl). Dibromomethane reaction of the nickelacyclopentane 9 gave the tricyclo[3.1.0.0 ]hexane system and 3,3,7,7-tetramethyl-rrani-tricyclo[4.1.0.0 ]heptane. On the other hand, treatment of the nickelacyclopentane 9 with trifluoroborane gives 3,3,6,6-tetramethylcyclohexa-l,4-diene. ... 

Physical and mechanical characteristics have been measured and catalogued for the phenyl quinoxaline family in a related internal research project. From these data, 3,3 -Bis(4-[3-ethynyl phenoxy] phenyl)-2,2 -diphenyl-6,6 biquinoxaline (or BA-DAB-BA for short) was selected. Bis-(triphenyl phosphine) nickel II chloride was chosen as the initiator. 

The use of diethyl(phenylthio)aluminum or a mixture of chlorodiethylaluminum and triphenyl-phosphane leads to the usual Claisen products 2 but with E and Z configuration in a nearly 1 1 ratio342. Other catalysts, such as diethyl(diethylthio)aluminum. (tcrt-butylthio) diethylaluminum or diisopropyl(phenoxy)aluminum, are ineffective. 

X-Hydroxy-1 lot, 15triphenyl-phosphonium bromide in a dry nitrogen atmosphere in 6.0 ml dry dimethyl sulfoxide wasadded 3.24 ml (6.5 mmols) of a 2.0M solution of sodium methylsulfinylmethide in dimethyl sulfoxide. To this red ylide solution was added dropwise a solution of 613 mg (1.29 mmols) 2-[50 -hydroxy-30 -(tetrahydropyran-2-yloxy)-2/3-(30 -tetrahydropyran-2-yloxy-4-phenoxy-trans-1-buten-1-yl)cyclopent-10 -yll acetaldehyde, 7-hemiacetal in 5.0 ml dry dimethyl sulfoxide over a period of 20 minutes. 

Poly(amide)s (PA)s that bear the sulfone group in the backbone have been described." These types of PA, which are based on 4,4 -bis-((3-carboxy-phenoxy)(p-benzoyl))-phenyl sulfone, c.f. Figure 7.7, or the corresponding 4-carboxy acid component" is amidized by an aromatic diamine, e.g., p-diaminobenzene. The direct polycondensation of a dicarboxylic acid with aromatic diamines uses triphenyl phosphite and pyridine. The introduction of m-structures increases the solubility of the polymers and leads to... 

Silver salts of 4,5,6-triphenyl-2-pyridone and 4,6-diphenyl-5-phenoxy-2-pyridone are mainly 0-alkylated by methyl iodide in methanol or benzyl chloride in benzene. The potassium salt of 4,5,6-triphenyl-2-pyridone in an... 

Triphenyl-2-pyridone and 5-phenoxy-4,6-diphenyl-2-pyridone are reported to be 0-alkylated by diazomethane. Citrazinic acid and its methyl ester (xn-514) give mixtures of the products of 0- and //-methylation. 4Carbomethoxy-6-methoxy-l-methyl-2-pyridone (XII-515) can be prepared from citrazinic acid by dimethyl sulfate to give methyl A-methylcitrazinate (Table XII-13/ which is then treated with diazomethane. 

C29HH0KNO10S, Dibenzo-30-crown-10 potassium thiocyanate, 46B, 343 C29H112O8, (E)-5,7-Di-t-butyl-3-(3 , 5 -di-t-butyl-5 -methoxy-2 , 5 -dihydrofuran-2 -ylidene)benzofuran-2(3H)-one, 44B, 313 C30H20O, 2,5-Diphenylphenanthro[9,10-b]oxepin, 46B, 343 C30H20O8, 4-Phenoxy-3,4,6-triphenyl-1H,4H-furo[3,4-c]furan-1-one, 44B, 85... 

A related procedure involves heating the alcohol with an adduct formed from triphenyl phosphite and methyl iodide.In this instance a reactive alkoxyphosphonium intermediate is formed by displacement of a phenoxy group at phosphorus. 

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