Multi-step reaction with 8 steps
1.1: tetrabutyl ammonium fluoride; 1,8-diazabicyclo[5.4.0]undec-7-ene / toluene / 2 h / Inert atmosphere; Reflux
1.2: 20 °C / pH 2 / Inert atmosphere
2.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 0 - 20 °C / Inert atmosphere
3.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C / Inert atmosphere
4.1: triethylamine / dichloromethane / 5 h / 0 - 20 °C / Inert atmosphere
5.1: N-ethyl-N,N-diisopropylamine; triphenylphosphine / tetrahydrofuran; water / 4 h / 20 °C / Inert atmosphere
6.1: triethylamine / dichloromethane / -10 - 20 °C / Inert atmosphere
7.1: lithium perchlorate / acetonitrile / 0.5 h / Inert atmosphere
7.2: 36 h / 80 °C / Inert atmosphere
8.1: hydrogenchloride / methanol / 1 h / 64 °C / Inert atmosphere
With
hydrogenchloride; tetrabutyl ammonium fluoride; lithium perchlorate; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; N-ethyl-N,N-diisopropylamine; triphenylphosphine;
In
tetrahydrofuran; methanol; dichloromethane; water; toluene; acetonitrile;
DOI:10.1021/jo500061w