hydrogenchloride in methanol; triethylamine; toluene T=60°C; 0.666667 h;

1: 73 percent / toluene; triethylamine / RT, 15 h; reflux, 1 h 2: 80 percent / 2.) HCl / toluene; triethylamine; methanol / 0.67 h / 60 °C View Scheme