Multi-step reaction with 12 steps
1: Et3N / CH2Cl2 / 2.33 h / 0 - 20 °C
2: 94 percent / imidazole / CH2Cl2 / 48 h
3: 91 percent / NaBH4; CaCl2 / tetrahydrofuran; ethanol / 0 °C
4: 91 percent / (COCl)2; DMSO; Et3N / CH2Cl2 / 0.83 h / -78 - 20 °C
5: 63 percent / t-BuLi / pentane; tetrahydrofuran / 2 h / -78 °C
6: 83 percent / i-Pr2NEt; Bu4NI / tetrahydrofuran / 20 h / Heating
7: 98 percent / ethyl acetate; H2O / 0.25 h
8: 98 percent / LiAlH4 / diethyl ether / 0.33 h / 0 °C
9: 80 percent / pyridine; DMAP / CH2Cl2 / 3.5 h
10: 95 percent / Bu4NF; AcOH / tetrahydrofuran / 2 h
11: 40 percent / DMSO; (COCl)2; Et3N / CH2Cl2 / 1 h / -78 °C
12: 64 percent / K2CO3 / methanol; H2O / 0.5 h
With
pyridine; 1H-imidazole; dmap; sodium tetrahydroborate; lithium aluminium tetrahydride; oxalyl dichloride; tetrabutyl ammonium fluoride; tert.-butyl lithium; tetra-(n-butyl)ammonium iodide; potassium carbonate; acetic acid; dimethyl sulfoxide; triethylamine; N-ethyl-N,N-diisopropylamine; calcium chloride;
In
tetrahydrofuran; methanol; diethyl ether; ethanol; dichloromethane; water; ethyl acetate; pentane;
4: Swern oxidation / 11: Swern oxidation;
DOI:10.1021/ol071147z