1,8-diazabicyclo[5.4.0]undec-7-ene in benzene-d6 byproducts: DBU*HCl; inert atmosphere (Ar or N2); 20°C, 17 h; (1)H-NMR; evapn., pentane addn., filtn.;

in not given byproducts: C6H2(CH3)3NH2; investigation of thermal decompn. in a sealed tube;; detected by 1H-NMR and gas chromy.; product ratio depends on reaction conditions;;