Multi-step reaction with 7 steps
1.1: 4-methyl-morpholine / tetrahydrofuran / 0.25 h / -15 °C
2.1: tetrahydrofuran; dichloromethane / -15 - 25 °C
3.1: silver trifluoroacetate / water; 1,4-dioxane / Sonication
4.1: camphor-10-sulfonic acid / toluene / 90 °C / Molecular sieve; Inert atmosphere
5.1: potassium hexamethylsilazane / tetrahydrofuran; toluene / 0.67 h / -78 °C / Inert atmosphere
5.2: -78 - -40 °C / Inert atmosphere
6.1: tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride / toluene / 2 h / Reflux; Inert atmosphere
7.1: triethylsilane; boron trifluoride diethyl etherate / dichloromethane
With
4-methyl-morpholine; tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride; triethylsilane; camphor-10-sulfonic acid; boron trifluoride diethyl etherate; silver trifluoroacetate; potassium hexamethylsilazane;
In
tetrahydrofuran; 1,4-dioxane; dichloromethane; water; toluene;
DOI:10.1016/j.tet.2013.05.016