Multi-step reaction with 8 steps
1.1: triethylamine / N,N-dimethyl-formamide / 2 h / -10 °C / Inert atmosphere
2.1: sodium hydride / N,N-dimethyl-formamide; mineral oil / 0.33 h / Cooling with ice; Inert atmosphere
2.2: 3 h / 20 °C / Inert atmosphere
3.1: borane-THF; trimethylsilyl trifluoromethanesulfonate / tetrahydrofuran; dichloromethane / 3 h / 23 °C / Inert atmosphere
4.1: pyridine; dmap / 20 h / 0 °C / Inert atmosphere
5.1: 18-crown-6 ether / acetonitrile / 24.5 h / 0.22 - 20 °C / Molecular sieve; Inert atmosphere
6.1: diisobutylaluminium hydride / toluene / 0.25 h / -78 °C / Inert atmosphere
6.2: 1 h / 20 °C / Inert atmosphere
7.1: sodium tetrahydroborate / methanol; dichloromethane / 1 h / 20 °C / Inert atmosphere
8.1: sodium hydride / N,N-dimethyl-formamide; mineral oil / 0.5 h / 0 °C / Inert atmosphere
8.2: 20 h / 20 °C / Inert atmosphere
With
pyridine; dmap; sodium tetrahydroborate; borane-THF; 18-crown-6 ether; trimethylsilyl trifluoromethanesulfonate; sodium hydride; diisobutylaluminium hydride; triethylamine;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; toluene; acetonitrile; mineral oil;
DOI:10.1021/jo500640n