Multi-step reaction with 13 steps
1: pyridine / CH2Cl2 / 14 h / Ambient temperature
2: imidazole / dimethylformamide / 16 h / 25 °C
3: (i-C4H9)2AlH / CH2Cl2; hexane / 0.5 h / -78 °C
4: pyridinium chlorochromate / CH2Cl2 / 6 h / 25 °C
5: 1.) n-C4H9Li / 1.) THF, -78 deg C, 1 h, 2.) room temp., 3 h
6: iodine / benzene / 1 h / Ambient temperature
7: AgNO3 / aq. ethanol; tetrahydrofuran / 1.) 0 deg C, 1 h, 2.) room temp., 1 h
8: 1.) n-C
3H
7NH
2, / 1.) Pd
6H5)3>4, 2.) CuI / 1.) benzene, room temp., 45 min, 2.) benzene, 25 deg C, 2 h
9: HF/pyridine complex / tetrahydrofuran / 1.) 0 deg C, 30 min, 2.) 0 - 25 deg C
10: aq. LiOH / tetrahydrofuran / 0 °C
11: diethyl ether / 0 °C
12: H2 / Lindlar catalyst / CH2Cl2 / 25 °C
13: aq. LiOH / methanol / 25 °C
With
pyridine; 1H-imidazole; propylamine; lithium hydroxide; n-butyllithium; hydrogen fluoride; hydrogen; iodine; diisobutylaluminium hydride; silver nitrate; pyridinium chlorochromate;
Lindlar's catalyst; copper(l) iodide; tetrakis(triphenylphosphine) palladium(0);
In
tetrahydrofuran; methanol; diethyl ether; ethanol; hexane; dichloromethane; N,N-dimethyl-formamide; benzene;
DOI:10.1055/s-1986-31673