Multi-step reaction with 4 steps
1: triethylamine; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide / acetonitrile; tetrahydrofuran / 0 - 25 °C / Inert atmosphere
2: caesium carbonate / N,N-dimethyl-formamide / 48 h / 60 °C / Inert atmosphere
3: hydrogenchloride / dichloromethane; 1,4-dioxane / 16 h / 18 - 25 °C / Inert atmosphere
4: triethylamine; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide / acetonitrile; tetrahydrofuran / 20 h / 18 - 25 °C / Inert atmosphere
With
hydrogenchloride; caesium carbonate; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; triethylamine;
In
tetrahydrofuran; 1,4-dioxane; dichloromethane; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1021/jm5001216