Multi-step reaction with 12 steps
1.1: iron(III)-acetylacetonate; 1,2-bis-(diphenylphosphino)ethane / tetrahydrofuran / 0.17 h / -78 °C
1.2: 20 h / -78 - 0 °C
2.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 3 h / 0 - 20 °C
3.1: zinc trifluoromethanesulfonate; pyridine N-oxide; citric acid; potassium osmate(VI) dihydrate / acetonitrile; aq. phosphate buffer / 36 h / 60 - 80 °C
4.1: 1H-imidazole / dichloromethane / 12 h / 0 - 20 °C
5.1: pyridine; dmap / dichloromethane / 18 h / 0 - 20 °C
6.1: 2,6-dimethylpyridine / dichloromethane / 12 h / -78 - 20 °C
7.1: hydrogen / ethyl acetate / 8 h / 30 °C
8.1: sulfur trioxide pyridine complex; dimethyl sulfoxide; N-ethyl-N,N-diisopropylamine / dichloromethane / 1 h / -50 - -10 °C
9.1: triethylamine; di-n-butylboryl trifluoromethanesulfonate / dichloromethane / 0.25 h / -78 - 0 °C
9.2: 3 h / 0 °C
10.1: 1H-imidazole; dmap / dichloromethane / 2 h / 0 - 20 °C
11.1: diisobutylaluminium hydride / tetrahydrofuran; hexane / 3.5 h / -78 °C
12.1: pyridine / 2.5 h / 0 - 20 °C
With
pyridine; 1H-imidazole; pyridine N-oxide; 2,6-dimethylpyridine; dmap; potassium osmate(VI) dihydrate; iron(III)-acetylacetonate; di-n-butylboryl trifluoromethanesulfonate; tetrabutyl ammonium fluoride; hydrogen; sulfur trioxide pyridine complex; zinc trifluoromethanesulfonate; diisobutylaluminium hydride; dimethyl sulfoxide; triethylamine; N-ethyl-N,N-diisopropylamine; 1,2-bis-(diphenylphosphino)ethane; citric acid;
In
tetrahydrofuran; aq. phosphate buffer; hexane; dichloromethane; ethyl acetate; acetonitrile;
9.1: |Evans Aldol Reaction / 9.2: |Evans Aldol Reaction;
DOI:10.1002/anie.201208919