Multi-step reaction with 9 steps
1.1: sodium tetrahydroborate / tetrahydrofuran; methanol / 3 h / 0 - 20 °C / Inert atmosphere
2.1: triethylamine / tetrahydrofuran / 0.5 h / 0 - 20 °C / Inert atmosphere
3.1: potassium carbonate / N,N-dimethyl-formamide / 1.5 h / 50 °C
4.1: potassium tert-butylate / N,N-dimethyl-formamide / 2 h / 0 - 20 °C / Inert atmosphere
5.1: methyl-phenyl-thioether; trifluoroacetic acid / 10 h / 50 °C / Inert atmosphere
6.1: sulfur trioxide pyridine complex; dimethyl sulfoxide; N-ethyl-N,N-diisopropylamine / ethyl acetate / 0.5 h / 0 °C
7.1: sodium hydride / tetrahydrofuran; mineral oil / 1.5 h / 0 - 20 °C / Inert atmosphere
7.2: 0.33 h / 0 - 20 °C
8.1: borane-THF; (3aR)-1-methyl-3,3-diphenyl-tetrahydro-pyrrolo[1,2-c][1,3,2]oxazaborole / toluene / 1.08 h / 20 °C / Inert atmosphere
9.1: sodium hydroxide / 1,2-dimethoxyethane; ethanol / 16 h / 20 °C
9.2: Cooling
With
sodium tetrahydroborate; borane-THF; methyl-phenyl-thioether; potassium tert-butylate; sulfur trioxide pyridine complex; sodium hydride; potassium carbonate; dimethyl sulfoxide; triethylamine; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid; sodium hydroxide; (3aR)-1-methyl-3,3-diphenyl-tetrahydro-pyrrolo[1,2-c][1,3,2]oxazaborole;
In
tetrahydrofuran; methanol; 1,2-dimethoxyethane; ethanol; ethyl acetate; N,N-dimethyl-formamide; toluene; mineral oil;
7.2: Horner-Wadsworth-Emmons olefination;
DOI:10.1016/j.bmc.2011.12.009