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. Author manuscript; available in PMC: 2011 Nov 25.
Published in final edited form as: J Med Chem. 2010 Oct 27;53(22):8187–8191. doi: 10.1021/jm1006148

Scheme 2.

Scheme 2

Reagents and reaction conditions: a. ethyl chloroformate, K2CO3, toluene, 90–100°C; b. NaN(TMS)2, N-(5-chloro-2-pyridyl)triflimide, THF, −78°C; c. 3-pyridineboronic acid, Pd(PPh3)4, K3PO4, dioxane, 85°C; d. LAH, THF.