methyllithium; diethylamine in diethyl ether; hexane; pentane Et2NH, pentane and BuLi in hexane mixing under N2, cooling to 20°C, epoxide in Et2O adding, stirring for 10 h, satd. aq. NaCl adding, org. phase washing several times with water, solvent removing, distilling in vacuo;

oxygen; rose bengal in methanol Irradiation (UV/VIS); singlet oxygen was generated by irradiation of O2 in the presence of rose Bengal and was reacted with Ge-compound in MeOH for 90 min at 20°C, aqueous soln. of NaBH4 was added;