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. Author manuscript; available in PMC: 2011 Dec 23.
Published in final edited form as: J Med Chem. 2010 Nov 23;53(24):8716–8726. doi: 10.1021/jm101048k

Scheme 4.

Scheme 4

Synthesis of Chloronaphthyridinonesa

aReagents and conditions: (a) POCl3, DMF, room temperature to 70 °C, 7 h (61%); (b) POCl3, PCl5, room temperature, 1 h, reflux, 1.5 h (66%).