Multi-step reaction with 10 steps
1: BH3*THF / tetrahydrofuran / 0 deg C, 1 h; r.t., 3 h
2: Fe, HCl / acetic acid; ethanol / 3 h / Heating
3: imidazole, DMAP / dimethylformamide / 18 h / Ambient temperature
4: 91 percent / LDA / tetrahydrofuran / -78 deg C, 30 min; r.t., 4 h
5: tetrahydrofuran / 3 h / Ambient temperature
6: HF / acetonitrile / Ambient temperature
7: 98 percent / PCC, SiO2, DCM / 6 h / Ambient temperature; ultrasound
8: 1.) HMDSLi / 1.) THF, -78 deg C -> 0 deg C, 90 min; 2.) THF, r.t., 24 h
9: 89 percent / 10percent HCl / tetrahydrofuran / 24 h
10: 92 percent / molecular sieves / benzene / 4 h
With
1H-imidazole; hydrogenchloride; dmap; molecular sieve; borane-THF; hydrogen fluoride; 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran; silica gel; iron; pyridinium chlorochromate; lithium hexamethyldisilazane; lithium diisopropyl amide;
In
tetrahydrofuran; ethanol; acetic acid; N,N-dimethyl-formamide; acetonitrile; benzene;
DOI:10.1016/S0040-4020(01)85078-X