1: 1.) CF3SO3H, (CH3O)2SO, 2.) NBA, / 1.) CH2Cl2, 40 deg C, 15 min, 2.) CHCl3, 2 h, RT; 2: 92 percent / NaOH / H2O / 3 h / 20 °C 3: KH2PO4, NaOH / 24 h / 90 °C 4: KOH, 35percent hydrazine, / Raney-Ni, / H2O / 2 h / 40 °C View Scheme

1: 1.) CF3SO3H, (CH3O)2SO, 2.) NBA, / 1.) CH2Cl2, 40 deg C, 15 min, 2.) CHCl3, 2 h, RT; 2: 92 percent / NaOH / H2O / 3 h / 20 °C 3: KH2PO4, NaOH / 24 h / 90 °C View Scheme

With  sodium hydroxide in  anhydrous xylene; water Show Experimental Procedure