Multi-step reaction with 12 steps
1.1: TBAF / tetrahydrofuran
2.1: Dess-Martin periodinane / CH2Cl2
3.1: Sn(OTf)2; 1-ethylpiperidine / CH2Cl2
4.1: 2,6-lutidine / CH2Cl2
5.1: DIBAL-H / toluene
6.1: Sn(OTf)2; 1-ethylpiperidine / CH2Cl2
7.1: MeONHMe*HCl; AlMe3 / CH2Cl2
7.2: 4-DMAP; pyridine / CH2Cl2 / 72 h / 20 °C
8.1: DIBAL-H / tetrahydrofuran / -78 °C
9.1: 46 percent / (R,R)-bisphosphoramide; DIPEA; TBAI / SiCl4 / CH2Cl2 / 96 h / -40 °C
10.1: imidazole; 4-DMAP / dimethylformamide / 72 h / 20 °C
11.1: DIBAL-H / tetrahydrofuran / -78 - -50 °C
12.1: 2,4,6-collidine / 0 °C
With
1-ethyl-piperidine; 1H-imidazole; 2,6-dimethylpyridine; 2,4,6-trimethyl-pyridine; dmap; tin(II) trifluoromethanesulfonate; (R,R)-bisphosphoramide; tetrabutyl ammonium fluoride; trimethylaluminum; N,O-dimethylhydroxylamine*hydrochloride; tetra-(n-butyl)ammonium iodide; diisobutylaluminium hydride; Dess-Martin periodane; N-ethyl-N,N-diisopropylamine;
tetrachlorosilane;
In
tetrahydrofuran; dichloromethane; N,N-dimethyl-formamide; toluene;
DOI:10.1055/s-2006-926263