Multi-step reaction with 12 steps
1: sodium ethanethiolate / dimethylformamide / 4 h / 160 °C
2: 94 percent / potassium carbonate, tetra-n-butylammonium iodide / dimethylformamide / 3 h / 25 °C
3: 87 percent / m-CPBA / CH2Cl2 / 1 h / 25 °C
4: 74 percent / 1 h / 70 °C
5: 89 percent / Dowex 1*8-200 / methanol / 24 h / 60 °C
6: 95 percent / 2,6-lutidine / CH2Cl2 / 1 h / 20 °C
7: 1.) THF, from -78 deg C to 0 deg C, 2.) THF, from -78 deg C to 25 deg C, 1 h
8: 95 percent / m-CPBA / CH2Cl2 / 2 h / 25 °C
9: 88 percent / tert-butyl mercaptan, tetra-n-butylammonium fluoride (TBAF) / tetrahydrofuran / 0.5 h / 20 °C
10: 100 percent / pyridinium chlorochromate (PCC), molecular sieves 4A / CH2Cl2 / 3 h / 25 °C
11: 78 percent / copper(I) iodide, n-butylamine, tetrakis(triphenylphosphine)palladium(0) / CH2Cl2 / 2 h / 25 °C
12: 1.) silver nitrate, 2.) potassium cyanide / 1.) H2O, EtOH, THF, 25 deg C, 1 h, 2.) H2O, EtOH, THF, 25 deg C, 30 min
With
2,6-dimethylpyridine; potassium cyanide; copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); 4 A molecular sieve; Dowex 1*8-200; tetrabutyl ammonium fluoride; tetra-(n-butyl)ammonium iodide; potassium carbonate; silver nitrate; 2-methylpropan-2-thiol; N-butylamine; 3-chloro-benzenecarboperoxoic acid; pyridinium chlorochromate; sodium thioethylate;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1021/ja00049a022