Multi-step reaction with 13 steps
1: Bu3P / CH2Cl2 / 3.5 h / 0 °C
2: 97 percent / MCPBA, NaHCO3 / CH2Cl2 / 1.) 0 deg C, 5 min, 2.) r.t., 45 min
4: 5percent Na/Hg, MeOH / ethyl acetate / 5 h / -20 °C
5: 85 percent / TBAF / tetrahydrofuran / 0.75 h / 0 °C
6: 85 percent / BuLi / tetrahydrofuran / 1 h / -50 - 40 °C
7: 1.) morpholine, 2.) HCl, H2O / 1.) THF, reflux, 2 h
8: 75 percent / HOAc / 2 h / 50 °C
9: 96 percent / imidazole / dimethylformamide / 168 h / -60 °C
10: 98 percent / pyridine, DMAP / 0.25 h / Ambient temperature
11: 99 percent / CSA / methanol; CH2Cl2 / 96 h / Ambient temperature
12: 90 percent / Ti(i-OPr)4 / 96 h / 100 °C
13: 98 percent / CSF / dimethylformamide / 24 h / Ambient temperature
With
morpholine; pyridine; 1H-imidazole; titanium(IV) isopropylate; hydrogenchloride; methanol; dmap; sodium amalgam; n-butyllithium; tributylphosphine; camphor-10-sulfonic acid; tetrabutyl ammonium fluoride; water; sodium hydrogencarbonate; acetic acid; 3-chloro-benzenecarboperoxoic acid; cesium fluoride;
In
tetrahydrofuran; methanol; dichloromethane; ethyl acetate; N,N-dimethyl-formamide;
DOI:10.1055/s-1999-3671