Multi-step reaction with 8 steps
1.1: thionyl chloride / 2 h / 0 °C / Reflux; Inert atmosphere
2.1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran / 0.17 h / Cooling with ice; Inert atmosphere
2.2: 12 h / 20 - 30 °C / Inert atmosphere
3.1: 3 h / 190 °C / Inert atmosphere
4.1: trifluorormethanesulfonic acid / 1,1-dichloroethane / 2 h / Inert atmosphere
5.1: acetic acid; iron / 12 h / 20 - 30 °C / Inert atmosphere
5.2: pH 7 - 8
6.1: toluene-4-sulfonic acid / Methyl isobutyl carbinol / 2 h / Reflux; Inert atmosphere
7.1: water; lithium hydroxide / methanol / 12 h / 50 °C / Inert atmosphere
7.2: pH 2 - 3
8.1: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / dichloromethane / 3 h / 20 - 30 °C / Inert atmosphere
With
thionyl chloride; water; iron; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; toluene-4-sulfonic acid; acetic acid; N-ethyl-N,N-diisopropylamine; triphenylphosphine; lithium hydroxide; diethylazodicarboxylate;
trifluorormethanesulfonic acid;
In
tetrahydrofuran; methanol; Methyl isobutyl carbinol; 1,1-dichloroethane; dichloromethane;