Di-3-naphthyl

For example, using hydroxy-terminated polybutadiene as the binder, RDX as the expl, toluenediisocyanate as a co-polymer, sym-di-(2-naphthyl)-p-phenylenediamine as an antioxidant, and poly butene as the plasticizer in a wt % ratio of 12.1/42.7/5/0.2/40, a castable expl is produced. 

We return now to the mercuro-de-diazoniation. Nesmeyanov s school continued the work on metallo-de-diazoniations from 1929 to 1953 (see summary by Nesmeyanov, 1972). A major discovery was made at the very beginning, namely the influence of copper powder (Nesmeyanov, 1929 b Nesmeyanov and Kahn, 1929). With this addition metallic mercury was not required instead the double salt of the diazonium chloride and mercuric chloride was used. The copper reacts stoichiometrically as an electron donor. Therefore, either arylmercuric chlorides (Scheme 10-87) or diarylmercury compounds (Scheme 10-88) can be obtained. These reactions are called Nesmeyanov reactions. Specific examples are the syntheses of di-2-naphthyl-... 

The fluorescence and laser properties of symmetrically and unsymmetrically substituted 2,5-diaryl-l,3,4-oxadiazoles were experimentally studied. It has been found that symmetrically substituted molecules (e.g., 2,5-di(2-naphthyl)-l, 3,4-oxadiazole) give laser oscillation at room temperatures, while unsymmetrical 2-(2-naphthyl)-5-phenyl-l,3,4-oxadiazole does not give laser action under any conditions, even at low temperatures <2000SAA2157>. 

Blue fluorescent emitters based on fused polyaromatic ring systems have long been known and systematic work has steadily improved the efficiencies and colors, while pushing the limits of stability in an operational device. A sky blue based on styrylamine doped 2-methyl-9,10-di(2-naphthyl)anthracene OLED was reported to provide the highest efficiency device (Scheme 3.99) [365],... 

M. Lee, H. Chen, C. Liao, C. Tsai, and C.H. Chen, Stable styrylamine-doped blue organic electroluminescent device based on 2-methyl-9,10-di(2-naphthyl)anthracene, Appl. Phys. Lett., 85 3301-3303 (2004). 

Di-2-naphthyl ditelluride (typical procedure) ° 2-Chloronaphthalene (2 mol equiv) is added to Na2Tc2 (prepared by heating equimolar amounts of Te and Na in HMPA under N2). The mixture is heated at 130-170°C for 16-24 h (yield 20% m.p. 116-118°C, recrystallized from hexane). 

In this context it is important to keep in mind, however, that di(2-naphthyl)ethylene (2 + 2) and 3-styrylphenanthrene (3 +1) form pentahelicene on irradiation, but in the presence of iodine it cyclizes into benzo[g,h,i]-perylene 17). The second cyclization... 

Tetralone gives with 194,343 or with l,3-di-m-tolyl-2-thiourea,344 dihydrobenz[a]acridines (199, R = H, Me) this ketone, on reaction with l,3-di-2-naphthyl-2-thiourea, gives a dihydrodibenz[a,j]acridine.343... 

A ketone contained in a five-menibered ring was also employed in these reactions when a-indanone was fused with 194 to give the indeno[3,2-b]quinoline 20 0 345 and with l,3-di-2-naphthyl-2-thiourea to give the indeno[3,2-6]-l-azaphenant.hrene 201. 

Intramolecular excimer formation of 1, -dinaphthylal kanes has been investigated in detail [319,320], Chandross and Dempster reported the first example of intramolecular photodimerization of l,3-di(l-naphthyl)propane (328), which was discovered during their intramolecular excimer study [321,322], Upon irradiation of 328 in methylcyclohexane, 328 formed 329, which is thermally unstable to give 330 (Scheme 92). Both 329 and 330 are converted substantially to 328 upon irradiation with 254-nm light. Similar irradiation of l,3-di(2-naphthyl)propane did not give any photocycloadduct. The authors assumed that the intramolecular cyclom-erization occurred via an intramolecular excimer. Davidson and Whelan reported further evidence for this assumption [320],... 

Bis-[2-chlor-ethyl]-amino)-1,3-bis-[4-methoxy-phenyl]-4,5-dioxo- -2-oxid E2, 656 2-(Bis-[2-chlor- ethyl -amino) -1,3-(di- 2- naphthyl) -... 

Fig. 31. Structures of l,l -di-2-naphthyl diethyl ether. (After de Schryver et al.

The attempted intramolecular cyclization of the substituted naphthylamines XVI failed and led only to an intermolecular coupling [92]. 4-Substituted diphenylamines form in a remarkable cyclodimerization 5,10-dihydro-5,10-diphenylphenazines [Eq. (10)] [84], One requirement is that all para positions must be substituted by groups that are not eliminated and not strongly electron withdrawing. Yields are increased by electrolyzing at low current densities. Di-(2-naphthyl)amine undergoes the same reaction anodically, but... 

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