Multi-step reaction with 9 steps
1: pyridine / tetrahydrofuran / 48 h / 66 °C
2: NaH / dimethylformamide; tetrahydrofuran / 1.) 23 deg C, 30 min, 2.) 90 deg C, 2 h
3: 1.) zirconocene (methyl) chloride, t-BuLi, 2.) I2 / 1.) THF, hexane, -78 deg C, 15 min; 23 deg C, 2 h, 2.) CH2Cl2, 0 deg C, 4 h
4: 95 percent / 90percent HNO3 / nitromethane / 1.) 0 deg C, 1 h, 2.) r.t., 2 h
6: 87 percent / hydrazine hydrate, FeCl3*6H2O, C / methanol / 10 h / Heating
7: 95 percent / CH3COONa, pyridine / 1.5 h / 60 °C
8: 94 percent / NaH / tetrahydrofuran / 1.) r.t., 15 min, 2.) r.t., 1 h
9: 64 percent / NaOAc, NBu4Cl / Pd(OAc)2 / dimethylformamide / 0.5 h / 70 °C
With
pyridine; zirconocene methyl chloride; tetrabutyl-ammonium chloride; iodine; tert.-butyl lithium; nitric acid; sodium acetate; iron(III) chloride; sodium hydride; hydrazine hydrate;
palladium diacetate;
In
tetrahydrofuran; methanol; nitromethane; N,N-dimethyl-formamide;
DOI:10.1021/jo00080a031