Multi-step reaction with 9 steps
1.1: lithium aluminium tetrahydride / tetrahydrofuran; hexane; ethyl acetate / 1 h / -78 - 0 °C / Inert atmosphere
2.1: diisopropylamine; n-butyllithium / tetrahydrofuran; hexane / 2.67 h / -78 - 20 °C / Inert atmosphere
2.2: 3 h / -78 °C / Inert atmosphere
2.3: 3 h / -116 °C / Inert atmosphere
3.1: tetra(n-butyl)ammonium hydroxide / tert-butyl alcohol; water / 20 h / 50 °C / Inert atmosphere
4.1: N-ethyl-N,N-diisopropylamine; 1-[(1-(cyano-?2-?ethoxy-?2-?oxoethylidenaminooxy)?dimethylamino-?morpholino)]-uronium hexafluorophosphate / N,N-dimethyl-formamide / 0.75 h / 20 °C / Inert atmosphere
4.2: 1 h / Inert atmosphere
5.1: 2,6-dimethylpyridine / dichloromethane / 0.5 h / 0 °C / Inert atmosphere
6.1: diisobutylaluminium hydride / dichloromethane / 0.5 h / -78 °C / Inert atmosphere
7.1: diethyl ether / 3 h / -78 °C / Inert atmosphere
7.2: 4 h / Inert atmosphere; Reflux
8.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 1 h / 20 °C / Inert atmosphere
9.1: pyridinium p-toluenesulfonate / acetone / 2 h / 20 °C / Inert atmosphere
With
2,6-dimethylpyridine; lithium aluminium tetrahydride; n-butyllithium; 1-[(1-(cyano-?2-?ethoxy-?2-?oxoethylidenaminooxy)?dimethylamino-?morpholino)]-uronium hexafluorophosphate; tetrabutyl ammonium fluoride; tetra(n-butyl)ammonium hydroxide; pyridinium p-toluenesulfonate; diisobutylaluminium hydride; diisopropylamine; N-ethyl-N,N-diisopropylamine;
In
tetrahydrofuran; diethyl ether; hexane; dichloromethane; water; ethyl acetate; N,N-dimethyl-formamide; acetone; tert-butyl alcohol;
DOI:10.1021/ol302999v