Multi-step reaction with 9 steps
1: methanol; sodium hydroxide / tetrahydrofuran / 3 h / 60 °C
2: oxalyl dichloride; N,N-dimethyl-formamide / tetrahydrofuran / 20 °C
3: pyridine / tetrahydrofuran / 16 h / 0 - 20 °C / Cooling with ice
4: tetrahydrofuran / 0 - 20 °C
5: manganese(IV) oxide / tetrahydrofuran / 24 h / Reflux
6: potassium tert-butylate; hydrogen; isopropyl alcohol / N,N-dimethyl-formamide / 24.5 h / 20 °C / Autoclave; Inert atmosphere
7: diphenyl phosphoryl azide; N-ethyl-N,N-diisopropylamine / 96 h / -40 - 20 °C
8: palladium on activated charcoal; ethanol / 2 h / 20 °C / Inert atmosphere
9: triethylamine / tetrahydrofuran / 0 - 20 °C
With
pyridine; methanol; manganese(IV) oxide; oxalyl dichloride; ethanol; diphenyl phosphoryl azide; palladium on activated charcoal; potassium tert-butylate; hydrogen; triethylamine; N-ethyl-N,N-diisopropylamine; N,N-dimethyl-formamide; isopropyl alcohol; sodium hydroxide;
In
tetrahydrofuran; N,N-dimethyl-formamide;
DOI:10.1021/jm300167z