Multi-step reaction with 9 steps
1: 1.) hexamethylphosphoramide (HMPA), n-butyllithium / 1.) THF, hexane, -78 deg C, 1 h, 2.) 90 min
2: 90 percent / trifluoroacetic acid / butan-1-ol / 0.17 h / Ambient temperature
3: 62 percent / triethylamine, 4-dimethylaminopyridine (DMAP) / dimethylformamide / Ambient temperature
4: 85 percent / red mercuric oxide, mercuric chloride / tetrahydrofuran; H2O / 0.08 h / 0 °C
5: 70 percent / sodium borohydride / ethanol; H2O / 0.5 h / Ambient temperature
6: 81 percent / pyridine / 3.5 h / 103 °C
7: 98.5 percent / 4-dimethylaminopyridine (DMAP) / acetonitrile / Ambient temperature
8: 27 percent / α,α-azobis(isobutyronitrile) (AIBN), tributyltin hydride / toluene / 3 h / 75 - 80 °C
9: 61 percent / dichloroacetic acid / CH2Cl2 / 0.5 h / Ambient temperature
With
pyridine; dichloro-acetic acid; N,N,N,N,N,N-hexamethylphosphoric triamide; dmap; sodium tetrahydroborate; n-butyllithium; azobisisobutyronitrile; tri-n-butyl-tin hydride; triethylamine; trifluoroacetic acid; mercury dichloride; mercury(II) oxide;
In
tetrahydrofuran; ethanol; dichloromethane; water; N,N-dimethyl-formamide; toluene; acetonitrile; butan-1-ol;
DOI:10.1021/jm00171a025