Catalytic Activation of the Leaving Group in the SN2 Reaction

Org. Lett., 9 (20), 4029 -4032
Hirofumi Yamamoto, Ghanshyam Pandey, Yumiko Asai, Mayo Nakano, Atsushi Kinoshita, Kosuke Namba, Hiroshi Imagawa, and Mugio Nishizawa

They had very good idea here.







the mechanism proposed: