Multi-step reaction with 7 steps
1.1: toluene-4-sulfonic acid / 1,4-dioxane / 0.25 h / 140 °C / Microwave irradiation; Sealed tube
2.1: caesium carbonate / acetonitrile / 2 h / 60 °C
3.1: trifluoroacetic acid / dichloromethane / 20 °C
4.1: triethylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / acetonitrile / 0.25 h / 20 °C
4.2: 48 h / 50 °C
5.1: sodium hydroxide; methanol / tetrahydrofuran / 40 °C
5.2: 20 °C
6.1: triethylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / N,N-dimethyl-formamide / 0.08 h / 20 °C
6.2: 20 °C
7.1: trifluoroacetic acid / dichloromethane / 1 h / 20 °C
With
methanol; caesium carbonate; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; toluene-4-sulfonic acid; triethylamine; trifluoroacetic acid; sodium hydroxide;
In
tetrahydrofuran; 1,4-dioxane; dichloromethane; N,N-dimethyl-formamide; acetonitrile;