I would give anhydrous K2CO3 in anhydrous methanol a try, see 1st link.  If that doesn't work then try AgF 1. equiv, MeOH, 23 °C, 3.5 h. followed by 1M HCl, see second link.

http://ac.els-cdn.com/S0040402099000459/1-s2.0-S0040402099000459-main.pdf?_tid=ffda10c8-8f02-11e6-a67e-00000aacb360&acdnat=1476115552_c1f42dd2d6779d7163f830af6ac1f1e1

http://www.scielo.org.mx/pdf/jmcs/v55n3/v55n3a1.pdf

Thank you so much prof. Bruce Levison 

thanks Rafael Arcos-Ramos