Multi-step reaction with 7 steps
1.1: sodium tetrahydroborate / water; ethanol / 2 h / 0 °C
2.1: tetra-(n-butyl)ammonium iodide; 2,4,6-tri-tert-butylpyrimidine / dichloromethane / 144 h / 20 °C / Molecular sieve; Inert atmosphere
3.1: sodium methylate / methanol; dichloromethane
4.1: 2,2,6,6-tetramethyl-piperidine-N-oxyl; [bis(acetoxy)iodo]benzene / water; dichloromethane / 3 h / 20 °C
5.1: O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine; dmap / dichloromethane / 2 h / 20 °C
6.1: pyridine hydrogenfluoride / tetrahydrofuran / Inert atmosphere
7.1: N-ethyl-N,N-diisopropylamine; 1-[(1-(cyano-?2-?ethoxy-?2-?oxoethylidenaminooxy)?dimethylamino-?morpholino)]-uronium hexafluorophosphate / N,N-dimethyl-formamide / 0.33 h / Inert atmosphere
7.2: 24 h / 50 °C / Inert atmosphere
With
dmap; 2,2,6,6-tetramethyl-piperidine-N-oxyl; sodium tetrahydroborate; [bis(acetoxy)iodo]benzene; 1-[(1-(cyano-?2-?ethoxy-?2-?oxoethylidenaminooxy)?dimethylamino-?morpholino)]-uronium hexafluorophosphate; sodium methylate; tetra-(n-butyl)ammonium iodide; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; pyridine hydrogenfluoride; N-ethyl-N,N-diisopropylamine; 2,4,6-tri-tert-butylpyrimidine;
In
tetrahydrofuran; methanol; ethanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1021/jo302508e