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. Author manuscript; available in PMC: 2010 Apr 13.
Published in final edited form as: Angew Chem Int Ed Engl. 2009;48(23):4158–4161. doi: 10.1002/anie.200900480

Scheme 5.

Scheme 5

Conditions: a) 2-benzyloxy-1-methyl-pyridinium triflate, MgO, PhCF3; 35%; b) LiOH, THF/H2O; Chelex 100 Na form; 69% over 2 steps; c) H2, Pd(OH)2/C, EtOAc/MeOH; 96%; d) 2-benzyloxy-1-methyl-pyridinium triflate, MgO, PhCF3; 27%; e) LiOH, THF/H2O; Chelex 100 Na form; 47% over 2 steps; f) H2, Pd(OH)2/C, EtOAc/MeOH; 82%.