Multi-step reaction with 5 steps
1: sodium hydrogensulfide / 1-methyl-pyrrolidin-2-one / 3 h / 140 - 160 °C
2: N-ethyl-N,N-diisopropylamine; 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene / tris-(dibenzylideneacetone)dipalladium(0) / 1,4-dioxane / 0.5 h / 150 °C / microwave
3: Oxone / tetrahydrofuran; methanol; water / 96 h / 0 - 20 °C
4: ammonium acetate; sodium cyanoborohydride / methanol / 16 h / 20 °C
5: O-<[cyano(ethoxycarbonyl)methylene]amino>-1,1,3,3-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 2 h / 20 °C
With
Oxone; sodium hydrogensulfide; O-<[cyano(ethoxycarbonyl)methylene]amino>-1,1,3,3-tetramethyluronium tetrafluoroborate; ammonium acetate; sodium cyanoborohydride; N-ethyl-N,N-diisopropylamine; 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene;
tris-(dibenzylideneacetone)dipalladium(0);
In
tetrahydrofuran; 1,4-dioxane; 1-methyl-pyrrolidin-2-one; methanol; water; N,N-dimethyl-formamide;