Multi-step reaction with 6 steps
1.1: 2.75 h / 110 °C / Inert atmosphere
2.1: triethylamine / ethanol / 2 h / 160 °C / microwave; Inert atmosphere
3.1: trifluoroacetic acid / 1,2-dichloro-ethane / 2 h / 20 °C / Inert atmosphere
4.1: 1,1'-carbonyldiimidazole / tetrahydrofuran / 1.75 h / 20 °C / Inert atmosphere; Reflux
4.2: Inert atmosphere; Reflux
5.1: water; sodium hydroxide / tetrahydrofuran; methanol / 18 h / 20 °C / Inert atmosphere
6.1: O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 1 h / 20 °C / Inert atmosphere
6.2: 20 °C / Inert atmosphere
With
water; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; triethylamine; N-ethyl-N,N-diisopropylamine; 1,1'-carbonyldiimidazole; trifluoroacetic acid; sodium hydroxide;
In
tetrahydrofuran; methanol; ethanol; 1,2-dichloro-ethane; N,N-dimethyl-formamide;