n-butyllithium in diethyl ether; hexane byproducts: butane; under N2, diamine in petroleum ether and diethyl ether cooled to 0°C, dropwise addn. of n-BuLi in hexane, warmed to room temp., stirred for 10 h, boiled for 6 h under reflux, cooled to -78°C, addn. of CH3BBr2 in petroleum ether, warmed; solvent distd. off, volatiles condensed into a trap (-196°C) at 80°C, distn.;

in benzene-d6 130°C (17 h); recrystn. (toluene / pentane = 1 : 4); elem. anal.;

triethylamine in diethyl ether

boiling in an inert solvent under nitrogene;

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