Multi-step reaction with 5 steps
1.1: 2 h / 4 - 20 °C
2.1: dicyclohexyl-carbodiimide; 1-hydroxy-pyrrolidine-2,5-dione / N,N-dimethyl-formamide / 5 h / 20 °C / Inert atmosphere
2.2: 20 °C / Inert atmosphere
3.1: methylamine / ethanol / 20 °C
4.1: N-ethyl-N,N-diisopropylamine; O-(N-succinimidyl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / N,N-dimethyl-formamide / 0.25 h / 20 °C / Inert atmosphere
4.2: 3 h / 20 °C / Inert atmosphere
5.1: sodium hydroxide / N,N-dimethyl-formamide; water / 0.33 h / 20 °C
With
1-hydroxy-pyrrolidine-2,5-dione; O-(N-succinimidyl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine; dicyclohexyl-carbodiimide; methylamine; sodium hydroxide;
In
ethanol; water; N,N-dimethyl-formamide;
DOI:10.1021/ic402234k