Multi-step reaction with 12 steps
1.1: potassium tert-butylate / tetrahydrofuran / 1.5 h / Inert atmosphere
1.2: 16.75 h / 20 °C / Inert atmosphere
2.1: N-Bromosuccinimide / ethyl acetate / 1.75 h / 20 °C
2.2: 1.5 h / Reflux
3.1: potassium tert-butylate / tetrahydrofuran / 0.5 h
3.2: 17 h / 20 °C
4.1: lithium hexamethyldisilazane / tetrahydrofuran / 2.5 h / -78 °C / Inert atmosphere
5.1: palladium 10% on activated carbon; hydrogen; triethylamine / methanol / 1 h / 2068.65 Torr / Inert atmosphere
6.1: triethylamine / dichloromethane / 0 °C
7.1: tris-(dibenzylideneacetone)dipalladium(0); N-Methyldicyclohexylamine; lithium chloride; tri tert-butylphosphoniumtetrafluoroborate / 1,4-dioxane / 1 h / 70 °C / Inert atmosphere
8.1: toluene-4-sulfonic acid / tetrahydrofuran / 60 h
9.1: sodium cyanoborohydride; acetic acid / 2 h / 20 °C
10.1: acetonitrile / 25 h / 20 °C / Inert atmosphere; Reflux
11.1: phenyl chloroformate / dichloromethane / 1 h / 20 °C
12.1: N-ethyl-N,N-diisopropylamine / dichloromethane; N,N-dimethyl-formamide / 16 h / 50 °C
With
tris-(dibenzylideneacetone)dipalladium(0); N-Bromosuccinimide; N-Methyldicyclohexylamine; palladium 10% on activated carbon; potassium tert-butylate; hydrogen; sodium cyanoborohydride; toluene-4-sulfonic acid; acetic acid; triethylamine; N-ethyl-N,N-diisopropylamine; phenyl chloroformate; lithium chloride; lithium hexamethyldisilazane; tri tert-butylphosphoniumtetrafluoroborate;
In
tetrahydrofuran; 1,4-dioxane; methanol; dichloromethane; ethyl acetate; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1021/jm200208d