Multi-step reaction with 10 steps
1: potassium carbonate / tetrahydrofuran; methanol; water / 3 h / 20 °C
2: 2,6-dimethylpyridine / dichloromethane / 18 h / 20 °C
3: dimethylsulfide borane complex / tetrahydrofuran / 6.25 h / 0 - 65 °C / Inert atmosphere
4: triethylamine / dichloromethane / 3.5 h / 0 - 20 °C
5: N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 7 h / 20 - 35 °C
6: dmap / tetrahydrofuran / 1 h / Reflux
7: tetrabutyl ammonium fluoride / tetrahydrofuran / 16 h
8: sodium hydride / N,N-dimethyl-formamide / 0 °C
9: 2,6-dimethylpyridine / dichloromethane / 11 h / 0 - 20 °C / Inert atmosphere
10: pyridine hydrogenfluoride / tetrahydrofuran / 0.5 h / 20 °C
With
2,6-dimethylpyridine; dmap; dimethylsulfide borane complex; tetrabutyl ammonium fluoride; sodium hydride; potassium carbonate; pyridine hydrogenfluoride; triethylamine; N-ethyl-N,N-diisopropylamine;
In
tetrahydrofuran; methanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1021/jm500994n