Spijker, Nynke M. et al. published their research in Journal of Organic Chemistry in 1990 | CAS: 80480-15-5

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.SDS of cas: 80480-15-5

A very convenient synthesis of cyclopenta[cd]pyrene was written by Spijker, Nynke M.;Van den Braken-Van Leersum, Anne M.;Lugtenburg, Johan;Cornelisse, Jan. And the article was included in Journal of Organic Chemistry in 1990.SDS of cas: 80480-15-5 The following contents are mentioned in the article:

Friedel-Crafts acylation of pyrene with BrCH2COBr in CH2Cl2 in the presence AlBr3 afforded 1-(bromoacetyl)pyrene, which cyclized to cyclopentapyrenone I on irradiation in CCl4. I was converted to cyclopenta[cd]pyrene by Wolff-Kishner reduction, followed by oxidation with DDQ. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5SDS of cas: 80480-15-5).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.SDS of cas: 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary