triethylamine in N,N-dimethyl-formamide 1 h; Ambient temperature;

1: 2.) sodium carbonate; 3.) HCl / 1.) MeOH, reflux, 8 h; 2.) reflux, 8 h 2: 57 percent / triethylamine / dimethylformamide / 1 h / Ambient temperature View Scheme

1: 2.) sodium carbonate; 3.) HCl / 1.) MeOH, reflux, 8 h; 2.) reflux, 8 h 2: 57 percent / triethylamine / dimethylformamide / 1 h / Ambient temperature View Scheme