Multi-step reaction with 6 steps
1: 82 percent / potassium carbonate / CH2Cl2; H2O / 1.) 0 deg C, 2 h, 2.) RT, 14 h
2: 83 percent / potassium tert-butoxide / tetrahydrofuran / 2 h / Heating
3: 54 percent / 2,4,6-trimethylpyridine, LiCl / dimethylformamide / 1.) 0 deg C, 15 min, 2.) 25 deg C, 3 h
4: 81 percent / 1,1,1,3,3,3-hexamethyldisilazane, n-butyllithium / tetrahydrofuran / 2 h
5: 1.) 1,1,1,3,3,3-hexamethyldisilazane, n-butyllithium, hexamethylphosphoric triamide / 1.) THF,hexane, -78 deg C, 1 h, 2.) THF, hexane, -78 deg C, 1 h
6: 30 percent / n-butyllithium / tetrahydrofuran; hexane / 0.33 h / -100 °C
With
2,4,6-trimethyl-pyridine; N,N,N,N,N,N-hexamethylphosphoric triamide; n-butyllithium; potassium tert-butylate; potassium carbonate; 1,1,1,3,3,3-hexamethyl-disilazane; lithium chloride;
In
tetrahydrofuran; hexane; dichloromethane; water; N,N-dimethyl-formamide;