Multi-step reaction with 8 steps
1.1: n-butyllithium; N,N,N',N'',N'''-pentamethyldiethylenetriamine / hexane; tetrahydrofuran / -70 °C / Inert atmosphere
1.2: 1 h
1.3: -10 - 20 °C
2.1: triethylamine / tetrahydrofuran / 20 °C / Cooling with ice; Inert atmosphere
3.1: n-butyllithium; N,N,N',N'',N'''-pentamethyldiethylenetriamine / hexane; tetrahydrofuran / 3 h / -72 - -56 °C / Inert atmosphere
3.3: 10 - 20 °C
4.1: guanidine hydrochloride / methanol / 1.5 h / 40 °C / Inert atmosphere
4.2: 22 h / 40 °C
5.1: potassium carbonate; sodium iodide / N,N-dimethyl-formamide / 13.5 h / 70 °C / Inert atmosphere
6.1: water; diammonium sulfide / tetrahydrofuran; methanol / 20 °C
7.1: acetonitrile / 0.83 h / 20 °C / Cooling
8.1: 2,4,6-trimethyl-pyridine / ethyl acetate; toluene / 85 °C
With
2,4,6-trimethyl-pyridine; diammonium sulfide; n-butyllithium; N,N,N',N'',N'''-pentamethyldiethylenetriamine; water; guanidine hydrochloride; potassium carbonate; triethylamine; sodium iodide;
In
tetrahydrofuran; methanol; hexane; ethyl acetate; N,N-dimethyl-formamide; toluene; acetonitrile;