Multi-step reaction with 7 steps
1: 1.) 1,1'-Carbonyldiimidazole / 1.) DMF, room temp., 2 h, 2.) overnight
2: NaHCO3 / H2O; methanol / 1 h / Heating
3: 1.) 1,1'-Carbonyldiimidazole / 1.) DMF, room temp., 2 h, 2.) overnight
4: NaHCO3 / H2O; methanol / 1 h / Heating
5: 1.) 1,1'-Carbonyldiimidazole / 1.) DMF, room temp., 2 h, 2.) overnight
6: NaHCO3 / methanol; H2O / 1 h / Heating
7: 1.) 1,1'-Carbonyldiimidazole / 1.) DMF, room temp., 2 h, 2.) overnight
With
sodium hydrogencarbonate; 1,1'-carbonyldiimidazole;
In
methanol; water;
DOI:10.1002/ardp.19873200210