Multi-step reaction with 7 steps
1: 80 percent / P-II Nickel, H2, ethylenediamine / ethanol
2: 1.) NaH / 1.) THF, room temperature, 1h, 2.) 6 h.
3: 80 percent / 5N HCl / methanol / 5 h / Ambient temperature
4: (+)-diisopropyl tartrate, molecular sieves 4 Angstroem, titanium tetraisopropoxide, 7M tert-butylhydroperoxide / CH2Cl2; 2,2,4-trimethyl-pentane / 48 h / -20 °C
5: 1.) Et3N, 2.) NaH / 1.) CH2Cl2, room temperature, overnight, 2.) THF, 5 h.
6: 80 percent / CH2Cl2 / 4 h / Ambient temperature
7: 85 percent / DDQ / CH2Cl2; H2O / 2 h / Ambient temperature
With
titanium(IV) isopropylate; hydrogenchloride; tert.-butylhydroperoxide; L-(+)-diisopropyl tartrate; 4 A molecular sieve; P-II Nickel; hydrogen; sodium hydride; ethylenediamine; triethylamine; 2,3-dicyano-5,6-dichloro-p-benzoquinone;
In
methanol; 2,2,4-trimethylpentane; ethanol; dichloromethane; water;
DOI:10.1080/00397919708006062