Multi-step reaction with 5 steps
1: 80 percent / SOCl2, pyridine / CHCl3 / 2 h / 55 - 60 °C
2: 1.) NaHCO3 / 1.) water, RT, 0.5 h, 2.) water, methanol, 16 h
3: 1.) KOH / 1.) CH3OH, 1-5 deg C, 2.) CH3OH, a) 0-5 deg C, 1 h, b) 40-45 deg C, 2 h
4: 89 percent / 10 percent NaOH / methanol / 2 h / 26 °C
5: 1.) I2, piperazine hexahydrate, 2.) 1 N HCl / 1.) CH3OH, 25 deg C, 64 h, 2.) H2O, CH3OH, 25 deg C, 18 h
With
piperazine; pyridine; hydrogenchloride; potassium hydroxide; sodium hydroxide; thionyl chloride; iodine; sodium hydrogencarbonate;
In
methanol; chloroform;
DOI:10.1021/jm00145a011