Dibenz a/i anthracene

Coke (coal tar), high temperature pitch Coke (coal tar), mixed coal-high temperature pitch Coke (coal tar), low temperature, high temperature pitch Diaminotoluene o-Dianisidine Salts of o-dianisidine o-Dianisidine-based azodyes Diarsenic trioxide Diazomethane Dibenz(a,/i)anthracene 1,2-Dibromo-3-chloropropane... 

Note Bi, biphenyl Nap, naphthalene Phe, phenanthrene Anth, anthracene Hu, fluoranthene Pyr, pyrene Chr, chrysene BaAnth, benz[a]anthracene BaPyr, benzo[a]pyrene BbFlu, benzo[h]fluoranthene DBaAnth, dibenz[a,/i]anthracene 3-Me-Chol, 3-methylcholanthrene. 

FIGURE1.15 Separation of the 16 EPA priority pollutants PAHs with ODS column using an acetonitrile water 70 30 (v/v) solution as mobile phase. Thiourea was used as standard. Detection performed at 254 nm and 30°C. PAHs 1, naphthalene 2, acenaphtylene 3, fluorene 4, acenaphthene 5, phenanthrene 6, anthracene 7, fluoranthene 8, pyrene 9, chrysene 10, benz(a)anthracene 11, benzo(fc)fluoranthene 12, benzo(l )fluoranthene 13, benzo(a)pyrene 14, dibenz(a,/i)anthracene 15, indeno(l,2,3-cd)pyrene and 16, benzo(g,/j,/)perylene). (Reprinted from Nunez, O. et al., J. Chromatogr. A, 1175, 7, 2007. Copyright 2007, with permission from Elsevier.)... 

Based on this sequence, Blum et a/.158 have reported a general synthesis of unsubstituted K-region arene imines from the corresponding arene oxides. K-Imines of benz[a] anthracene, 7-methylbenz[a]anthracene, dibenz [a,/i] anthracene, and benzo[a] pyrene have been prepared. Azido alcohol formation from these oxides is generally nonregiospecific and both possible regioisomers of the azido alcohols are formed in different proportions. 

Dichlorophenoxybutyric acid Dibenzylideneacetone Dibenz[a,/i]anthracene Di-tert-butyl azodicarboxylate Dibenzo-1 S-crown-b/Brj... 

Fig. 1 Numbering and lettering approach for PAHs. (A) Numbering sequence of pyrene (B) lettering of faces of pyrene (C) anthracene (D) dibenz(a,/i)anthracene (E) benzo(y)fluor-anthene.

Severalcarcinogenichigheraromaticpolycyclichydrocarbons [are] present in tobacco smoke condensate. They include benzo[a]pyrene. .., benzo[e]pyrene. .., chrysene. .., benz[a] anthracene. .., dibenz[a,/i]anthracene. .., and dibenzo[a,i] pyrene. .. From the amount in which these materials have been found in tobacco smoke condensate it was evident that these, by themselves, could not account for the total biological activity observed. 

More recently, freshly isolated diploid Syrian hamster embryo cells were used in a quantitative focus assay. Transformed foci, observed within 3 weeks on a monolayer of normal cells, were induced in secondary cultures of cells after treatment of mass cultures for 6 days with A -acetoxy-2-acetylamino-fluorene, aflatoxin Bi, benzo [a]pyrene, jS-propriolactone, dibenz [a,/i] anthracene, ethyl methanesulfonate, 3-methylcholanthrene, methyl methanesulfo-nate, or A -methyl-A -nitro-A -nitrosoguanidine. 

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