Multi-step reaction with 7 steps
1.1: boron tribromide / dichloromethane / 2 h / -10 - 20 °C / Inert atmosphere
2.1: potassium carbonate / N,N-dimethyl-formamide / 16 h / 20 °C
3.1: hydrazine hydrate / 20 h / Reflux
4.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 0 °C / Inert atmosphere
5.1: N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 2 h / 20 - 80 °C
6.1: lithium hydroxide monohydrate / tetrahydrofuran / 16 h / 20 °C
7.1: di-isopropyl azodicarboxylate; 1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium-3-oxide hexafluorophosphate / 0.33 h / 20 °C
7.2: 16 h
With
lithium hydroxide monohydrate; di-isopropyl azodicarboxylate; 1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium-3-oxide hexafluorophosphate; boron tribromide; potassium carbonate; hydrazine hydrate; N-ethyl-N,N-diisopropylamine;
In
tetrahydrofuran; dichloromethane; N,N-dimethyl-formamide;