Multi-step reaction with 9 steps
1.1: toluene-4-sulfonic acid / toluene / 3.5 h / Reflux
2.1: 2,2,6,6-tetramethyl-piperidine; n-butyllithium / tetrahydrofuran; hexane / 2.42 h / -78 - -56 °C
3.1: trichlorophosphate / N,N-dimethyl-formamide / 4 h / Reflux
4.1: selenium(IV) oxide; water / 1,4-dioxane / 0 - 20 °C / Reflux
5.1: trichlorophosphate / 3 h / Reflux
6.1: sodium hydroxide / ethanol; water / 1 h / 20 °C
7.1: sodium / tetrahydrofuran / 75 °C
7.2: pH 2
8.1: N-ethyl-N,N-diisopropylamine; HATU / tetrahydrofuran; dichloromethane / 3.5 h / 20 °C
9.1: trimethylsilyl bromide / acetonitrile / 0 - 20 °C
9.2: 2 h / 20 °C
With
2,2,6,6-tetramethyl-piperidine; selenium(IV) oxide; n-butyllithium; trimethylsilyl bromide; water; sodium; N-ethyl-N,N-diisopropylamine; HATU; sodium hydroxide; trichlorophosphate;
toluene-4-sulfonic acid; N,N-dimethyl-formamide;
In
tetrahydrofuran; 1,4-dioxane; ethanol; hexane; dichloromethane; water; toluene; acetonitrile;