Acephenanthrylene. benz

Being interested here in the volatile components of coffee aroma, we shall arbitrarily limit the list of the aromatic hydrocarbons to tricyclic structures. The higher fused polycyclic hydrocarbons (fluoranthene [206-44-0], pyrene [129-00-0], chrysene [218-01-9], benz[ ]anthracene (1,2-benzanthracene) [56-55-3], benz[< ]acephenanthrylene (3,4-benzofluoranthene) [205-99-2], benzo[ ]pyrene (3,4-benzopyrene, 3,4-BP) [50-32-8], benzo[e]pyrene (1,2-benzopyrene) [192-97-2], perylene [198-55-0], benzo[g,/i,/]perylene (1,12-benzopyrene) [191-24-2], and dibenz[ ,//]anthracene (1,2,5,6-dibenzanthracene) [53-70-3]) cannot be considered as a part of the aroma. However, as some of these, specially benzo[o pyrene, are known for carcinogenic properties, they have been particularly analyzed in food subject to roasting or smoke-curing. 

Benz[ ]acephenanthrylene was formerly known as benzo[b]fluor-... 

Benz[ ]acephenanthrylene is the currently accepted name for benzo[ ]fluoranthene. 

Benz[e]acephenanthrylene, B-70010 Benz[/]acephenanthrylene, B-70011 Cyclopenta[c< pleiadene, C-80191... 

Synonyms Benz[e]acephenanthrylene 3,4-Benz[e]acephenanthrylene 2,3-Benzfluoranthene 3,4-Benzfluoranthene Benzo[e]fluoranthene 2,3-Benzofluoranthene 3,4-Benzofluoranthene 3,4-Benzo[ ]fluoranthene B(6)F BRN t872553 CCRtS 72 NSC 89365. 

SYNS 3,4-BENZ(e)ACEPHENANTHRYLENE 2,3-BENZFLUORANTHENE 3,4-BENZFLUORANTHENE BENZO(b)FLUORANTHENE BENZO(e)FLUOR-ANTHENE 2,3-BENZOFLUORANTHENE 3,4-BENZOFLUORANTHENE 2,3-BENZOFLUOR-ANTHRENE B(b)F... 

BENZACENAPHTHENE see FDFOOO BENZ(e)ACEPHENANTHRYLENE see BAW250 3,4-BENZ(e)ACEPHENANTHRYLENE see BAW250 BENZACILLIN see BFC750 BENZACONINE see PIC250... 

Weyand EH, Amin S, Sodhi R, et al. 1991c. Effects of methyl substitution on the metabolism and binding of benz[e]acephenanthrylene. In Garriques P, Lamotte M, eds. Polycyclic aromatic compounds. Synthesis, properties, analytical measurements, occurence, and biological effects. Proceedings of the thirteenth international symposium on polynuclear aromatic hydrocarbons. Philadelphia, PA Gordon and Breach. 

Benz[e]acephenanthrylene 2,3-benzfluoranthene 3,4-benzfluoranthene 2,3-benzofluoranthene 3,4-benzof1uoranthene ... 

The thermal disrotatory [n6] electrocyclization of cis-1,3,5-hexatriene systems has been extensively employed for the synthesis of cyclic hydrocarbons. The average enthalpy of activation is in the range of about 120 kJ mol 1 [36]. The incorporation of two of the hexatriene double bonds in phenyl rings (stil-bene, 1) stabilizes the precursor significantly and necessitates temperatures of 1050°C to obtain a 30% yield of phenanthrene (2, see Scheme 2, [37]). An enthalpy of activation of (250 20) kJ mok was estimated for the conversion of 9,9 -bifluorenylidene (3) to benz[e]indeno[l,2,3-hi]acephenanthrylene (4), a reaction that is accompanied by the radical initiated isomerization of 3 to diben-zo[g,p]chrysene (5, Scheme 2, [38]). It is assumed that both reactions 1 —> 2 and 3 —> 4 are initiated by an electrocyclic ring closure forming a 4 a,4 fr-dihydro-phenanthrene (la) intermediate. 

Table XXIII-5 catalogs the components in the various lists co-authored by Hoffmann. In an attempt at simplification, the seqnence of components in Table XXIII-5 approximates the seqnence in many of the articles. Also in Table XXIII-5, the varions components listed by Hoffmann and colleagues (1727, 1740,1741,1743,1744,1773,1808) are listed in the most recently accepted nomenclatnre, for example, benzo[b]fluoranthene is listed as benz[e]acephenanthrylene, dibenzo[a,/]pyrene is listed as dibenzo[(iej p]chrysene, catechol is listed as 1,2-benzenediol. In each case, the nomenclature used in the Hoffmann articles accompanies the most recent nomenclature listing.

Results from many studies have been reported on the types and levels of PAHs, with particular emphasis on B[a]P, B[a]A, chrysene, benz[e]acephenanthrylene (benzo[fc]fluoranthene), benzoMfluoranthene, indeno[l,2,3-C(i]pyrene, DB[fl,/t]A, and benzo[g/t/]perylene. As noted by Menzie et al. (2533), all of these PAHs have been identified in exhausts or effluents from fossil fuel combustion sources, in soils, sediments, and water, and in a variety of commonly used foodstuffs. 

Benz[e]acephenanthrylene, lndeno[l, 2,3-czi]pyrene-Pyrenea benzo[a]pyrene Benzo[/]fluoranthene ... 

SYNONYMS Benzo(b)fluoranthene, B(b)F, Benz(e)acephenanthrylene, 2,3-benzo fluoranthene, Benzo[e]fluoranthene, B[E]F... 

Synonyms benzo[e]fluoranthene 3,4-benzofluoranthene benz[e]acephenanthrylene ... 

Polycyclic aromatic hydrocarbons (PAH) in atmospheric particles have received a great deal of attention because of the known carcinogenic effects of some of these compounds. The most prominent of these compounds is benzo(a)pyrene and other examples are benz(a)anthracene, chrysene, benzo(e)pyrene, benz(e)acephenanthrylene, benzo(j)fluoranthene, and indenol. Some representative structures of PAH compounds are given as follows ... 

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