Multi-step reaction with 6 steps
1: 1.) NaH / 1.) THF, 50-55 deg C, 30 min, 2.) THF, reflux, 8 h
2: 86 percent / H2 / 10percent Pd/C / methanol; CHCl3 / 12 h / Ambient temperature
3: 95.5 percent / triethylamine, 4-(N,N-dimethylamino)pyridine / CH2Cl2; dimethylformamide / 24 h / Ambient temperature
4: 60.9 percent / 4-(N,N-dimethylamino)pyridine, DCC / CH2Cl2 / 96 h / Ambient temperature
5: 66.7 percent / pyridinium p-toluenesulfonate, MeOH / CH2Cl2 / 0 - 5 °C
6: 1.) Et3N / 1.) CH2Cl2, RT, overnight, 2.) CHCl3, EtOH, from 70 deg C to 80 deg C
With
methanol; dmap; hydrogen; pyridinium p-toluenesulfonate; sodium hydride; triethylamine; dicyclohexyl-carbodiimide;
palladium on activated charcoal;
In
methanol; dichloromethane; chloroform; N,N-dimethyl-formamide;
DOI:10.1016/S0957-4166(97)00341-8