Multi-step reaction with 6 steps
1.1: triethylamine / butan-1-ol / 36 h / Reflux; Inert atmosphere
2.1: N-iodo-succinimide / N,N-dimethyl-formamide / 2.16 h / 10 - 20 °C / Inert atmosphere
3.1: 2,2,6,6-tetramethyl-piperidine; n-butyllithium / tetrahydrofuran; hexane / 2.25 h / -74 - 0 °C / Inert atmosphere
3.2: 0.58 h / -60 °C / Inert atmosphere
3.3: Reflux; Inert atmosphere
4.1: lithium hexamethyldisilazane / 1-methyl-pyrrolidin-2-one / 90 °C / Inert atmosphere
5.1: tris-(dibenzylideneacetone)dipalladium(0); 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene; sodium t-butanolate / 1,4-dioxane / 1 h / 150 °C / Inert atmosphere; Microwave irradiation
6.1: trifluoroacetic acid / dichloromethane / 0.5 h / 20 °C / Inert atmosphere
With
2,2,6,6-tetramethyl-piperidine; tris-(dibenzylideneacetone)dipalladium(0); N-iodo-succinimide; n-butyllithium; triethylamine; 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene; trifluoroacetic acid; lithium hexamethyldisilazane; sodium t-butanolate;
In
tetrahydrofuran; 1,4-dioxane; 1-methyl-pyrrolidin-2-one; hexane; dichloromethane; N,N-dimethyl-formamide; butan-1-ol;
DOI:10.1021/jm500118j