Multi-step reaction with 5 steps
1: 1.) N-methylmorpholine, ethyl chloroformate, 2.) N-methylmorpholine / 1.) DMF, -20 deg C, 2 min, 2.) DMF, -20 deg C, then 0 deg C, 2 h, then overnight, room temperature
2: 97.3 percent / NaOH, water / ethanol / 1.5 h / Ambient temperature
3: 1.) N-methylmorpholine, ethyl chloroformate, 2.) N-methylmorpholine / 1.) DMF, -20 deg C, 2 min, 2.) DMF, -20 deg C, then 0 deg C, 2 h, then overnight, room temperature
4: HCl / acetic acid / 1 h / Ambient temperature
5: 84.7 percent / triethylamine / CHCl3 / 1.) 2 h, 2.) room temperature, overnight
With
4-methyl-morpholine; hydrogenchloride; sodium hydroxide; water; chloroformic acid ethyl ester; triethylamine;
In
ethanol; chloroform; acetic acid;