& $ a Grignard reagent prepared directly in normal fashion with Mg. Lithiation performed with n-butyllithium, except for entry 9, in which case sec-butyllithium was employed. Anhydrous magnesium bromide added. Anhydrous magnesium bromide added. combustion analysis and/or high-resolution mass spectroscopy;---indicates triazene not isolated but directly converted to amine. e Yield based upon the titer of the solution of the ...