13-Diamino naphthalene

Benzo-l,2,3-triazin-4-ones with the general structure 6.54 (X = O, S, or H2) are obtained by diazotization of the appropriate aniline derivatives 6.53 (Scheme 6-38). In polar aprotic solvents (e. g., nitrobenzene) the reverse reaction takes place to give the diazonium ion (for an example see Kullick, 1966). Diazotization of 1,8-diamino-naphthalene yields l-i/-naphthol[l,8-cfe]triazine (6.55 Tavs et al., 1967). In concentrated HC1 the triazine ring is opened again. 

Heterocyclic phosphines 32 were prepared from base-induced condensation of a secondary 1,8-diamino-naphthalene with phosphorus trichloride (the corresponding As- and Sb-analogues were obtained analogously) and converted into cyclic phosphenium cations 33 by Lewis acid promoted halide abstraction using GaCl3 or trimethylsilyl triflate as reagents (Scheme 18) [15, 92],... 

On the basis of the formal similarity between 1,8-diamino-naphthalene and 3,4-diaminothienothiophene (1) the latter might be able to form a fused pyrimidine system on reaction with orthoformic ester or formamide. However, heating dimethyl 3,4-diaminothieno[2,3-6]-thiophene-2,5-dicarboxylate with acetic anhydride gave the corresponding MiV -diacetyl derivative, while 3,4-diacyloxy derivatives resulted from analogous reaction of dimethyl 3,4-dihydroxythieno-[2,3-6]thiophene-2,5-dicarboxylate with orthoformic ester and acetic anhydride."... 

The reaction of diethyl acetylenedicarboxylate with 1,8-diamino-naphthalene gave the 2-oxo-3-ethoxycarbonylmethylene compound (262) and the corresponding 2,3-bis(ethoxycarbonyl) compound.311... 

Sibi has reported the 15N NMR chemical shifts of 1,2-diaminobenzenes, 1,8-diamino-naphthalenes and their monoprotonated species (Table 12)91. 

With 1,8-diamino naphthalene Ni l,8-(NH2)2-C,oH, 3(C104)2 295 3999 c. 3.08 Gouy six-coordination suggested 68K2... 

Ji, X.-B., and Hollocher, T. C. (1988a). Mechanism for nitrosation of 2,3-diamino-naphthalene by Escherichia coli Enzymatic production of NO followed by 02-dependent chemical nitrosation. Appl. Environ. Microbiol. 54, 1791-1794. 

Another class of chiral tetranuclear complexes are tetrahedral metal-ligand assembled clusters of M4L6 stoichiometry for Ga(III), A1(III), and Fe(III) with A,/V -bis(2,3-dihydroxybenzoyl)-1,5-diamino-naphthalene. This ligand acts as a... 

FIGURE 5.20 Schematic drawing of the binding of /V./V -his(2,3-dihydroxybenz<)yl)- l, 5-diamino-naphthalene to M4 clusters.72... 

Nitric oxides 4-Amino-5-methylamino-2 ,7 -di luoro-fluorescein (DAF), 2,3-Diamino-naphthalene and N-methyl-4-hydra-zino-7-nitrobenzofurazan Role of nitric oxide in signal transduction has been recently realised, yielding new fluorimetric assays for NO and NO. 30... 

Figs. 4-15. 4-16 pH dependence of CVs for poly(l-amino pyrene) (4-15. left, with pH values indicated, reproduced with permission from ref. [48]), and for poly(2,3-diamino naphthalene) (4-16. reproduced with permission from ref. [49]). 

Naphthalene-3,7-disulfonic acid, 1,2-diamino-iron complexes filter dyes, 6,104 Naphthoic acid, hydroxy-metal complexes, 2, 480, 482... 

Reported structures for homobifunctional aryl azides include a biphenyl derivative and a naphthalene derivative (Mikkelsen and Wallach, 1976), a biphenyl derivative containing a central, cleavable disulfide group (Guire, 1976), and a compound containing a central l,3-diamino-2-propanol bridge between phenyl azide rings that are nitrated (Guire, 1976). The only commercially available homobifunctional photoreactive crosslinker is BASED. 

Only in a few cases has this compound been isolated from the products of hydrolysis of proteins, since its separation is extremely laborious. It can only be effected after all the other amino acids have been removed by crystallisation and by the ester method, and after the diamino acids have been precipitated by phosphotungstic acid. From the last mother-liquors it is obtained by crystallisation, and is best identified in the form of its /8-naphthalene sulpho-derivative. 

Diamino-2,l>3-benzothiadiazole 201 undergoes cyclization on reaction with selected aromatic aldehydes <2004T2953>. Thus, reactions with pyrene-l-carboxaldehyde or naphthalene-1-carboxaldehyde in refluxing toluene produce the corresponding imidazoles 202 in moderate yields, whereas reactions with /i-(Ar,Ar-dimethylamino)benz-aldehyde and /i-[Ar,Ar-di(4-methylphenyl)amino]benzaldehyde under similar conditions gave the corresponding 5-imino derivatives 203 (Scheme 13). 

Better yields of azo and hydrazo compounds are sometimes obtained by reducing the azoxy compound in preference to the nitro compound. Certain hydrazo compounds, e.g., hydrazo-naphthalenes, undergo the benzidine conversion (see p. 160) in alkaline as well as in neutral solution, so that the product finally isolated in the reduction is a diamino base. (J. C. S., 125, 1108.)... 

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