Multi-step reaction with 17 steps
1.1: 40 percent / Eu(fod)3 / 72 h / 0 °C
2.1: BH3*THF
2.2: 72 percent / H2O2; NaOH
3.1: 2,6-lutidine
4.1: H2 / Pd(OH)2
5.1: Dess-Martin periodinane
5.2: 88 percent / K2CO3 / methanol
6.1: DIBALH
6.2: 98 percent / Dess-Martin periodinane
7.1: 75 percent / Sn(OTf)2; N-ethylpiperidine
8.1: 89 percent / NaBH4 / tetrahydrofuran; H2O
9.1: TBAF / 50 °C
10.1: imidazole
11.1: 95 percent / DCC; DMAP / CH2Cl2 / 3000240 Torr
12.1: 85 percent / HF*pyridine / pyridine; tetrahydrofuran
13.1: Bu3SnH / Pd(Ph3P)2Cl2
13.2: TFP / Pd2(dba)3 / 1-methyl-pyrrolidin-2-one / 60 °C
14.1: Dess-Martin periodinane
15.1: 94 percent / TBAF / dimethylformamide
With
1-ethyl-piperidine; 1H-imidazole; 2,6-dimethylpyridine; dmap; sodium tetrahydroborate; tin(II) trifluoromethanesulfonate; borane-THF; tetrabutyl ammonium fluoride; hydrogen; tri-n-butyl-tin hydride; diisobutylaluminium hydride; Dess-Martin periodane; pyridine hydrogenfluoride; dicyclohexyl-carbodiimide;
bis-triphenylphosphine-palladium(II) chloride; palladium dihydroxide; Eu(fod)3;
In
tetrahydrofuran; pyridine; dichloromethane; water; N,N-dimethyl-formamide;
1.1: hetero-Diels-Alder reaction / 5.1: Dess-Martin oxidation / 7.2: Dess-Martin oxidation / 14.2: Stille coupling / 15.1: Dess-Martin oxidation / 16.1: Wittig extention;
DOI:10.1021/ol048811l