Multi-step reaction with 13 steps
1: thionyl chloride / 24 h / 0 °C / Reflux; Inert atmosphere
2: trichloroisocyanuric acid; triethylamine / N,N-dimethyl-formamide / 2 h / -20 - 0 °C / Inert atmosphere
3: N-chloro-succinimide / ethyl acetate / 18 h / Inert atmosphere; Reflux
4: hydrazine hydrate / pentan-1-ol / 7 h / Reflux; Inert atmosphere
5: hydrogenchloride; sodium nitrite / water / 2 h / 0 °C / Inert atmosphere
6: acetic acid / water / 1 h / Reflux; Inert atmosphere
7: chloroform / 0.5 h / 40 °C / Inert atmosphere
8: sodium nitrate; trifluoroacetic acid / 18 h / 0 - 20 °C / Inert atmosphere
9: hydrogenchloride / water / 12 h / Reflux; Inert atmosphere
10: acetic acid / methanol / 4 h / 20 °C / pH 4 / Inert atmosphere
11: sodium cyanoborohydride / methanol / 1 h / 20 °C / Inert atmosphere
12: hydrogenchloride; tin(II) chloride dihdyrate / methanol; water / 48 h / 0 - 20 °C / Inert atmosphere
13: dmap / chloroform / 3 h / 20 °C / Inert atmosphere
With
hydrogenchloride; dmap; sodium nitrate; N-chloro-succinimide; thionyl chloride; tin(II) chloride dihdyrate; trichloroisocyanuric acid; sodium cyanoborohydride; hydrazine hydrate; acetic acid; triethylamine; trifluoroacetic acid; sodium nitrite;
In
methanol; pentan-1-ol; chloroform; water; ethyl acetate; N,N-dimethyl-formamide;
6: Curtius rearrangement;
DOI:10.1016/j.bmcl.2012.03.077