Multi-step reaction with 12 steps
1.1: lithium aluminium tetrahydride / tetrahydrofuran / 19 h / Cooling with ice; Reflux
2.1: triethylamine / dichloromethane / 2 h / 0 - 20 °C / Cooling with ice
3.1: potassium carbonate / N,N-dimethyl-formamide / 56 h / 20 - 40 °C
4.1: sodium hydroxide / tetrahydrofuran / 2 h / 20 °C
5.1: aluminum (III) chloride; thionyl chloride / dichloromethane; N,N-dimethyl-formamide / Cooling with ice
6.1: palladium 10% on activated carbon; hydrogen / ethanol / 72 h / 20 °C
7.1: sodium hydroxide / ethanol / 10 h / Reflux
8.1: 1H-imidazole; triethylamine; thionyl chloride / dichloromethane / 1 h / 0 °C
8.2: 1.5 h / 0 °C
9.1: sodium hydride / N,N-dimethyl-formamide; mineral oil / 2.5 h / 20 °C
10.1: Chiralpak AD / ethanol; methanol / Resolution of racemate
11.1: N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 18 h / 20 °C
12.1: palladium 10% on activated carbon; hydrogen / tetrahydrofuran / 12 h
With
1H-imidazole; aluminum (III) chloride; lithium aluminium tetrahydride; thionyl chloride; palladium 10% on activated carbon; hydrogen; sodium hydride; potassium carbonate; triethylamine; N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate; sodium hydroxide;
In
tetrahydrofuran; methanol; ethanol; dichloromethane; N,N-dimethyl-formamide; mineral oil;
DOI:10.1002/cmdc.201300525