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. Author manuscript; available in PMC: 2012 Mar 10.
Published in final edited form as: J Med Chem. 2011 Feb 7;54(5):1490–1510. doi: 10.1021/jm101535e

Scheme 1.

Scheme 1

Reagents: i. ROH, HBTU, TEA, DMAP, DMF; ii. (a) CF3COOH (b) FmocCl, Na2CO3, Dioxane, H2O; iii. (a) (Boc)2O, TEA, H2O (b) R′OH, HBTU, DMAP, TEA, DMF; iv. (a) HCl-dioxane (b) (Boc)2O (1eq.), TEA, MeOH; v. PS-Carbodiimide, PS-DMAP, CH2Cl2.