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. Author manuscript; available in PMC: 2011 Sep 21.
Published in final edited form as: Bioorg Med Chem Lett. 2008 Sep 11;18(20):5443–5447. doi: 10.1016/j.bmcl.2008.09.032

Scheme 3.

Scheme 3

Reagents: (a) PhSO2Cl, PS-DIEA, 88%; (b) MPB( OAc)3H, 5-halo-1-(4-piperidinyl)-2-benzimidazolones 13, DCM, rt, 24 hr, 85–95%; (c) m-SCF3NCO, PS-DIEA, 80%; All compounds purified by mass-directed HPLC to analytical purity (>98%).