Chemoselectively dihydroxylate a terminal alkene in the presence of an internal alkene? The goal is to dihydroxylate the exo alkene, and then convert to a ketone.

Any suggestions would be apprecitated to either chemoselectively convert the terminal alkene, or directly convert the terminal alkene to a ketone. 

Thank you!
The Lemieux-Johnson oxidation (details here) using catalytic $\ce{OsO4}$ or $\ce{RuO4}$ turned over with $\ce{NaIO4}$ will do the transformation you want in one step. These conditions should be selective for the exo double bond.