in pyridine; water T=100°C; 0.75 h;

1: 89 percent / pyridine / 1.) 0 deg C, 1 h, 2.) 5 deg C, 20 h. 2: 87 percent / sodium methoxide / methanol / 0.5 h / Ambient temperature View Scheme

1H-imidazole in N,N-dimethyl-formamide T=150°C; 4 h;