Multi-step reaction with 12 steps
1.1: NaH; (n-Bu)4NI / tetrahydrofuran; dimethylformamide / 24 h / 25 °C
2.1: TBAF / tetrahydrofuran / 15 h / 25 °C
3.1: 89 percent / (COCl)2; DMSO; Et3N / CH2Cl2 / 1 h / -78 - 25 °C
4.1: KHMDS; TESCl / tetrahydrofuran / 0.5 h / -78 °C
4.2: PhSeCl / CH2Cl2 / 0.5 h / -78 °C
4.3: 80 percent / aq. H2O2 / tetrahydrofuran / 1 h / 0 - 25 °C
5.1: 93 percent / LiHMDS / tetrahydrofuran / 6 h / -78 °C
6.1: Yb(OTf)3 / tetrahydrofuran / 2 h / 25 °C
7.1: 2,6-lutidine / CH2Cl2 / 0.5 h / -78 °C
8.1: 87 percent / aq. tert-butyl hydroperoxide; triton B / tetrahydrofuran / 16 h / 25 °C
9.1: 91 percent / (PhSe)2; NaBH4 / ethanol / 0.5 h / 25 °C
10.1: 63 percent / NaBH4 / methanol; CH2Cl2 / 24 h / 25 °C
11.1: TBAF / tetrahydrofuran / 1 h / 0 - 25 °C
12.1: Et3N; DMAP / CH2Cl2 / 6 h / 25 °C
With
2,6-dimethylpyridine; tert.-butylhydroperoxide; dmap; sodium tetrahydroborate; oxalyl dichloride; triethylsilyl chloride; diphenyl diselenide; tetrabutyl ammonium fluoride; tetra-(n-butyl)ammonium iodide; N-benzyl-trimethylammonium hydroxide; potassium hexamethylsilazane; sodium hydride; dimethyl sulfoxide; triethylamine; lithium hexamethyldisilazane; ytterbium(III) triflate;
In
tetrahydrofuran; methanol; ethanol; dichloromethane; N,N-dimethyl-formamide;
3.1: Swern oxidation / 5.1: Mander carboxylation;
DOI:10.1002/anie.200500216