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. 2016 Oct 5;2016:3864193. doi: 10.1155/2016/3864193

Scheme 1.

Scheme 1

Reagents and conditions: (a) Zn, AcOH, reflux [15]; (b) HCl, EtOH-H2O, 25°C [15]; (c) SOCl2, DMF, reflux [15]; (d) AcCl, NEt3, CH2Cl2, reflux [16]; (e) DMF, (CH3)2RN, 50°C; (f) H2O, HCl, 25°C.