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. Author manuscript; available in PMC: 2008 Aug 31.
Published in final edited form as: J Med Chem. 2005 Dec 29;48(26):8261–8269. doi: 10.1021/jm050765n

Scheme 5.

Scheme 5

Reagents: a) 11, NEt3, CH2Cl2, room temp., 14 h; b) Dess-Martin periodinane, pyridine, CH2Cl2, room temp., 2 h; c) 4-methyl-piperazin-1-yl-amine, ethanol, 1 h reflux, 14 h room temp.