N-ethoxycarbonyl-2-ethoxy-1,2-dihydroquinoline in dichloromethane T=35°C; 18 h;

1: (NH4)2S / ethanol; water / 2.5 h / 65 - 70 °C / Inert atmosphere 2: N-ethoxycarbonyl-2-ethoxy-1,2-dihydroquinoline / dichloromethane / 18 h / 35 °C / Inert atmosphere View Scheme

1: ethanol / 24 h / Inert atmosphere; Reflux 2: (NH4)2S / ethanol; water / 2.5 h / 65 - 70 °C / Inert atmosphere 3: N-ethoxycarbonyl-2-ethoxy-1,2-dihydroquinoline / dichloromethane / 18 h / 35 °C / Inert atmosphere View Scheme

1: ethanol / 24 h / Inert atmosphere; Reflux 2: (NH4)2S / ethanol; water / 2.5 h / 65 - 70 °C / Inert atmosphere 3: N-ethoxycarbonyl-2-ethoxy-1,2-dihydroquinoline / dichloromethane / 18 h / 35 °C / Inert atmosphere View Scheme

1: With phosphorus pentachloride in chloroform 4 h; Heating / reflux; 2: With ammonia in chloroform; water T=20°C; pH=9 - 10;