Multi-step reaction with 7 steps
1: 62 percent / trifluoromethanesulfonic acid / CH2Cl2; cyclohexane / 20 h / Ambient temperature
2: 1.) 2)2>PF6, H2, 2.) iodine, pyridine / 1.) THF, 50 deg C, 2 h, 2.) THF, H2O, RT, 15 min
3: thionyl bromide, DMF / CH2Cl2 / 5 h / Ambient temperature
4: 1.) 4 Angstroem molecular sieves, 2.) HgBr2 / 1.) CH2Cl2, RT, 1 h, 2.) CH2Cl2, RT, 20 h
5: zinc / acetic acid / 16 h / 40 - 50 °C
6: DCC / CH2Cl2 / 15 h / Ambient temperature
7: 57 percent / pyridine, DMAP / CH2Cl2 / 20 h / Ambient temperature
With
pyridine; dmap; sulfurous dibromide; (1,5-cyclooctadiene)[bis(methyldiphenylphosphine)]iridium(I) hexafluorophosphate; trifluorormethanesulfonic acid; 4 A molecular sieve; hydrogen; iodine; N,N-dimethyl-formamide; dicyclohexyl-carbodiimide; mercury dibromide; zinc;
In
dichloromethane; cyclohexane; acetic acid;
DOI:10.1248/cpb.44.2268