Multi-step reaction with 8 steps
1.1: NaH / dimethylformamide / 0.5 h / ice bath cooling
1.2: 80 percent / dimethylformamide / 2 h / 20 °C
2.1: 99 percent / aq. HCl / methanol / 1 h / 20 °C
3.1: (Bu3Sn)2O / toluene / 1.5 h / 110 °C
3.2: 53 percent / Bu4NBr / toluene / 2 h / 110 °C
4.1: 53 percent / 4-(dimethylamino)pyridine; pyridine / 0.67 h / 0 - 20 °C
5.1: (1,5-cyclooctadiene)bis(PPh2Me)Ir(I)*PF6 / tetrahydrofuran / 1.5 h / 20 °C
5.2: 60 percent / AcCl / tetrahydrofuran; methanol / 0.5 h / 20 °C
6.1: imidazole / dimethylformamide / 18 h / 85 °C
6.2: 60 percent / 2,6-lutidine / dimethylformamide / 18 h / 65 °C
7.1: 83 percent / NaOMe / methanol / 18 h / 20 °C / pH 12
8.1: 82 percent / aq. NaIO4 / acetonitrile / 6 h / 65 °C
With
pyridine; 1H-imidazole; hydrogenchloride; dmap; sodium periodate; sodium methylate; sodium hydride; bis(tri-n-butyltin)oxide;
(1,5-cyclooctadiene)[bis(methyldiphenylphosphine)]iridium(I) hexafluorophosphate;
In
tetrahydrofuran; methanol; N,N-dimethyl-formamide; toluene; acetonitrile;
DOI:10.1039/b316506j