hydrogenchloride in ethanol; water T=20°C; 3 h; other reagents: triethylamine, 4-(dimethylamino)pyridine, 1,8-diazabicyclo<5.4.0>undec-7-ene, tetrabutylammonium hydroxide, HClO4;
4-(N,N-dimethlyamino)pyridine in dichloromethane T=20°C; 25 h; other reagents: triethylamine, 1,8-diazabicyclo<5.4.0>undec-7-ene, tetrabutylammonium hydroxide; Further byproducts given. Title compound not separated from byproducts;
1,8-diazabicyclo[5.4.0]undec-7-ene in dichloromethane T=20°C; 1 h; other reagents: triethylamine, 4-(dimethylamino)pyridine, tetrabutylammonium hydroxide; Further byproducts given. Title compound not separated from byproducts;
