Multi-step reaction with 8 steps
1: 1) n-BuLi / 1) THF, hexane, 1 h, RT, 2) THF, hexane, 1 h, RT
2: 81 percent / PhSH, AIBN / benzene / 0.5 h / Heating
3: 93 percent / pyridine / 20 h / 0 °C
4: mCPBA / CH2Cl2 / 2.5 h / Heating
5: 1) NaOMe, 2) SiO2 / 1) MeOH, 2.5 h, RT, 2) CH2Cl2, 32 h, RT
6: 82 percent / 1M HCl / dioxane / 0.5 h / Heating
7: 85 percent / imidazole / dimethylformamide
8: 87 percent / CSA / acetone / 2 h / Ambient temperature
With
pyridine; 1H-imidazole; hydrogenchloride; n-butyllithium; 2,2'-azobis(isobutyronitrile); camphor-10-sulfonic acid; sodium methylate; silica gel; thiophenol; 3-chloro-benzenecarboperoxoic acid;
In
1,4-dioxane; dichloromethane; N,N-dimethyl-formamide; acetone; benzene;
DOI:10.1246/bcsj.62.2328