12 a M= Co (dmgH), py. hex-5-enyl radical (branch b) I0 and abstraction of a chlorine atom from 2 by the cyclopentylmethyl radical. When the same reaction is carried out in the presence of a large excess of 2 or of trichloromethanesulfonyl chloride (4), not only does the rate at which the hex-5-enyl radical abstracts a chlorine atom from 2 or from 4 (Scheme I, branch c) become larger than the rate at which that radical rearranges but the radical ...
[Ashcroft, Martyn M.; Bougeard, Peter; Bury, Adrian; Cooksey, Christopher J.; Johnson, Michael D.; et al. Journal of Organic Chemistry, 1984 , vol. 49, # 10 p. 1751 - 1761]