Multi-step reaction with 9 steps
1: 1.) KOH, 2.) oxalyl chloride / 1.) methanol, 5 deg C, 50 h, 2.) benzene, 35 deg C, 3 h
2: 42.5 g / Et3N / tetrahydrofuran / 16 h / Ambient temperature
3: pyridine, HOAc / 1 h / 100 °C
4: 58 percent / 0.5 N aq. NaOH / tetrahydrofuran / 4 h / Ambient temperature
5: conc. aq. HCl, acetic acid / 24 h / Heating
6: HCl / 18 h
7: 82 percent / Na2CO3 / H2O / 1 h
8: 94.9 percent / 1N aq. NaOH / methanol / 0.17 h
9: 59.7 percent / Et3N, DCC / CH2Cl2 / 1.) 0 deg C, 30 min, 2.) RT, 18 h
With
pyridine; hydrogenchloride; potassium hydroxide; sodium hydroxide; oxalyl dichloride; sodium carbonate; acetic acid; triethylamine; dicyclohexyl-carbodiimide;
In
tetrahydrofuran; methanol; dichloromethane; water;
DOI:10.1021/jm00353a005