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. Author manuscript; available in PMC: 2013 Sep 13.
Published in final edited form as: Curr Med Chem. 2008;15(26):2664–2679. doi: 10.2174/092986708786242877

Scheme 7.

Scheme 7

Reagents and conditions: i) BF3 diethyletherate (Fries reaction); ii) CDI, K2CO3, DMAP, 10–90%; iii) K2CO3, l-(2-chloroethyl)pyrrolidine, 30–75%; iv) 30–50% HBr, AcOH.