THF (catalyst) in tetrahydrofuran; anhydrous butyl ether
under N2, educts heated under reflux in n-Bu2O-THF for 21 h in the dark; cooled soln. filtered through Kieselguhr, evapd. in vac., solid dissolved in acetone, filtered, pptd. by addn. of light petroleum, recrystd. from acetone/light petroleum; elem. anal.;
参考文献
Mahaffy, Christopher A. L.
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1984 , vol. 14, p. 679 - 688
