Figure 4
Synthesis of the title compound (I): (i) AcCl, MeOH, HCl(aq), room temperature, closed system; (ii) 4-nitrophenol, LiOH·H2O, acetone/H2O, room temperature; (iii) MeONa/MeOH, CH2Cl2, 273 K. The water molecule of crystallization of (I) is not represented. |