Multi-step reaction with 9 steps
1: 1) magnesium, dibromoethane / 1) THF, reflux, 2) 2 h, 0 deg C
2: 3.7 g / 30percent H2O2, NaHCO3 / methanol; tetrahydrofuran / 15 h / Heating
3: pyridine / 0 deg C to r. t., overnight
4: 0.41 g / pyridine, 4-dimethylaminopyridine / 0.5 h
5: 82 percent / H2 / 10percent Pd-C / ethyl acetate / 24 h / 3000.2 Torr
6: p-toluenesulfonic acid / acetonitrile / 0.5 h / Ambient temperature
7: pyridine, 4-dimethylaminopyridine / acetonitrile / 1 h
8: 0.58 g / 90percent aq. trifluoroacetic acid / acetonitrile / 0.5 h
9: 10 percent / methyl triflate, 4 Angstroem molecular sieves, triethylamine / diethyl ether / 0.5 h
With
pyridine; dmap; 1,1-Dibromoethane; 4 A molecular sieve; hydrogen; dihydrogen peroxide; sodium hydrogencarbonate; toluene-4-sulfonic acid; magnesium; triethylamine; trifluoroacetic acid; methyl trifluoromethanesulfonate;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; diethyl ether; ethyl acetate; acetonitrile;
DOI:10.1016/0008-6215(90)80133-N