in pentane byproducts: Li(CH3COCHCOCH3), C7H12, Cu; under inert atmosphere; at -20°C Cu(CH3COCHCOCH3)2 is added to asoln. of 1-NorLi in pentne; mixt. stirred for 3 h, warmed to room temp.; filtn.; concd. to 30 ml; cooled to -30°C; recrystn. from pentane; dried in vac.; elem. anal.;