Multi-step reaction with 11 steps
1: imidazole-1-sulfonyl azide hydrochloride; copper(ll) sulfate pentahydrate; potassium carbonate / methanol / 4 h / 20 °C
2: trimethylsilyl trifluoromethanesulfonate / dichloromethane / 144 h / 20 °C / Cooling with ice
3: trimethylsilyl trifluoromethanesulfonate / dichloromethane / 144 h / 20 °C / Inert atmosphere
4: methanol; sodium / 1.5 h / Inert atmosphere
5: camphorsulfonic acid / acetonitrile / 16 h
6: sodium hydride / N,N-dimethyl-formamide; mineral oil / 5.5 h / Inert atmosphere
7: borane-THF; di-n-butylboryl trifluoromethanesulfonate / dichloromethane; tetrahydrofuran / 0 °C
8: dmap; pyridine / dichloromethane / 2 h / 0 - 20 °C
9: N-Bromosuccinimide / acetone / 0 °C
10: 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 3 h / Inert atmosphere
11: trimethylsilyl trifluoromethanesulfonate / dichloromethane / 0.5 h / -30 °C / Inert atmosphere
With
pyridine; methanol; dmap; imidazole-1-sulfonyl azide hydrochloride; N-Bromosuccinimide; copper(ll) sulfate pentahydrate; borane-THF; trimethylsilyl trifluoromethanesulfonate; di-n-butylboryl trifluoromethanesulfonate; camphorsulfonic acid; sodium; sodium hydride; potassium carbonate; 1,8-diazabicyclo[5.4.0]undec-7-ene;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; acetone; acetonitrile; mineral oil;
DOI:10.1021/jo300722y