[pkbum]

Hi Guys,

I have some question about mechanism about PCC for alkene.  I know the PCC oxidation for alcohol but when I look at chemical transformation given in this journal, I m stumbled. 
http://pubs.acs.org/doi/abs/10.1021/jo00183a030

My guess is
1. Ene like mechanism.
or 2. Go through a radical intermediate.

It would help if you guys can shed me some light on this chemistry.

Thank you