Multi-step reaction with 7 steps
1: 1.) n-butyllithium / 1.) THF, hexane, 0 deg C, 2 h, 2.) THF, hexane, overnight
2: 1.) n-butyllithium / 1.) THF, hexane, 0 deg C, 2 h, 2.) THF, hexane, overnight
3: bromine / CCl4 / 0.5 h / 0 °C
4: KN(TMS)2 / tetrahydrofuran; toluene / 0.5 h / 0 °C
5: 73 percent / triethylamine, CuI, PPh3, (Ph3P)2PdCl2 / 2 h / 25 °C
6: 88 percent / tri-o-tolylphosphine, acetic acid, tetramethyldihydrodisiloxane / Pd(H)OAc / benzene / 0.67 h / Ambient temperature
7: 2.) mesyl azide, triethylamine / 1.) benzene, reflux, 1 h, 2.) acetonitrile, 4 h
With
bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; n-butyllithium; tetramethyldihydrodisiloxane; bromine; potassium hexamethylsilazane; acetic acid; triethylamine; Methanesulfonyl azide; triphenylphosphine; tris-(o-tolyl)phosphine;
Pd(H)OAc;
In
tetrahydrofuran; tetrachloromethane; toluene; benzene;
DOI:10.1021/jo970847m