Multi-step reaction with 8 steps
1: 6 percent Chromat. / 2(1,3-Bis(diphenylphosphino)propan)> / tetrahydrofuran; diethyl ether / 96 h / Ambient temperature
2: TsOH*H2O / methanol / 4 h / Ambient temperature
3: 1.) (COCl)2, DMSO, 2.) triethylamine / 1.) CH2Cl2, -78 deg C, 2.) -78 deg C to RT
4: 56 percent / tetrahydrofuran / Ambient temperature
5: 1H-imidazole / dimethylformamide / 5 h / Ambient temperature
6: TsOH*H2O / methanol / 4 h / Ambient temperature
7: 1.) (COCl)2, DMSO, 2.) triethylamine / 1.) CH2Cl2, -78 deg C, 2.) -78 deg C to RT
8: 92 percent / t-BuOK / tetrahydrofuran / 1.) -78 deg C, 10 min, 2.) RT, 3 h
With
1H-imidazole; oxalyl dichloride; potassium tert-butylate; toluene-4-sulfonic acid; dimethyl sulfoxide; triethylamine;
dichloro[propane-1,3-diylbis(diphenylphosphane)]nickel(II);
In
tetrahydrofuran; methanol; diethyl ether; N,N-dimethyl-formamide;
DOI:10.1002/hlca.19930760509