Multi-step reaction with 9 steps
1.1: 1H-imidazole / dichloromethane / 14 h / 0 - 20 °C / Inert atmosphere
2.1: copper(l) iodide / tetrahydrofuran; diethyl ether / 1 h / -78 - 20 °C / Inert atmosphere
3.1: tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride / dichloromethane / 6 h / 40 °C / Inert atmosphere
4.1: tris(dibenzylideneacetone)dipalladium(0) chloroform complex; trans-1,2-(1S,2S)-1,2-diaminocyclohexane-N,N’-bis(2’-diphenylphosphinobenzoyl) / tetrahydrofuran / 50 °C / Inert atmosphere
5.1: triethylamine / methanol / 0.75 h / 20 °C / Inert atmosphere
6.1: triphenylphosphine / dichloromethane / 0.33 h / 0 °C / Inert atmosphere
7.1: n-butyllithium / tetrahydrofuran; hexane / 0.83 h / -78 - -30 °C / Inert atmosphere
8.1: n-butyllithium / tetrahydrofuran; hexane / 0.5 h / -40 °C / Inert atmosphere
8.2: 1.25 h / -78 - 20 °C / Inert atmosphere
9.1: 2.5 h / 50 °C / Inert atmosphere
9.2: 0.5 h / 20 °C / Inert atmosphere
With
1H-imidazole; tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride; trans-1,2-(1S,2S)-1,2-diaminocyclohexane-N,N’-bis(2’-diphenylphosphinobenzoyl); tris(dibenzylideneacetone)dipalladium(0) chloroform complex; copper(l) iodide; n-butyllithium; triethylamine; triphenylphosphine;
In
tetrahydrofuran; methanol; diethyl ether; hexane; dichloromethane;
DOI:10.1021/ol302409g