Multi-step reaction with 10 steps
1: 89 percent / pyridinium chlorochromate, NaOAc / CH2Cl2 / 2 h
2: 18-crown-6, KN(TMS)2 / tetrahydrofuran; toluene / 0.5 h / -70 °C
3: 93 percent / diisobutylaluminium hydride / hexane; CH2Cl2 / 1 h / -70 to -20 deg C
4: 78 percent / molecular sieves (4 Angstroem), (+)-diethyl L-tartrate, titanium tetraisopropoxide, tert-butyl hydroperoxide / CH2Cl2; 2,2,4-trimethyl-pentane / 15 h / 4 °C
5: 68 percent / trimethylamine hydrochloride, titanium tetraisopropoxide / CH2Cl2 / 15 h / 23 °C
6: 88 percent / pyridine / 48 h / 23 °C
7: 98 percent / pyridinium p-toluenesulfonate / CH2Cl2 / 5 h / 23 °C
8: SnCl4 / CH2Cl2 / 1.5 h / 0 °C
9: n-Bu4NF / tetrahydrofuran / 2 h
10: 83 percent / HF/pyridine complex / 0.67 h / 23 °C
With
pyridine; titanium(IV) isopropylate; tert.-butylhydroperoxide; 18-crown-6 ether; diethyl (2R,3R)-tartrate; 4 A molecular sieve; hydrogen fluoride; tetrabutyl ammonium fluoride; sodium acetate; pyridinium p-toluenesulfonate; tin(IV) chloride; trimethylamine hydrochloride; potassium hexamethylsilazane; diisobutylaluminium hydride; pyridinium chlorochromate;
In
tetrahydrofuran; 2,2,4-trimethylpentane; hexane; dichloromethane; toluene;
DOI:10.1021/ja00215a040