F. Minisci et al., POLAR EFFECTS IN FREE-RADICAL REACTIONS - HOMOLYTIC HETEROAROMATIC SUBSTITUTIONS BY ALKYL BROMIDES, Journal of organic chemistry, 58(16), 1993, pp. 4207-4211
Alkyl bromides have been utilized for the first time as radical source
s for heteroaromatic substitution. A variety of Procedures was reveale
d to be successful for bromine abstraction: Bu3SnH with AIBN, (Me3Si)3
SiH with AIBN, PhSiH, Ph2SiH2, or Et3SiH associated with peroxides (H2
O2, t-BuOOH, (t-BuO)2, (t-BuOOCO)2, (PhCOO)2). The importance of the p
olar effects is discussed.