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. Author manuscript; available in PMC: 2011 Sep 29.
Published in final edited form as: Bioorg Med Chem Lett. 2008 Aug 29;18(20):5626–5630. doi: 10.1016/j.bmcl.2008.08.087

Scheme 1.

Scheme 1

Reagents and conditions: (a) ArNHNH2, EtOH, mw, 105 °C, 10 min, 54–77%; (b) i) H2SO4, 0°C, ii) H2NCHO, mw, 200 °C, 20 min, 48–91%; (c) i) POCl3, DMF, mw, 120 °C, 45 min, ii) HNR1R2, DMF, PS-DIEA, mw, 90 °C, 20 min, 84–99%.18,19