in 1,2,5-trimethyl-benzene dropwise addn. of acetamide to boron compd. soln., 160°C, 3.5h; heating (reflux), 10h; evapn.; all under Ar; distn.; elem. anal.;
in neat (no solvent) addn. of boron compd. to equimolar amt. of aminoalkanol, room temp.; driving out CH3NH2 in a stream of Ar, 20-80°C, 4h;; distn. (vac.); elem. anal.; monocyclic : bicyclic isomer = 95:5;
in neat (no solvent) addn. of boron compd. to equimolar amt. of aminoalkanol, room temp.; driving out CH3NH2 in a stream of Ar, 20-80°C, 24h;; distn. (vac.); elem. anal.; monocyclic : bicyclic isomer = 95:5;
in neat (no solvent) addn. of boron compd. to equimolar amt. of aminoalkanol, room temp.; driving out CH3NH2 in a stream of Ar, 20-25°C, 22h; distn. (vac.); elem. anal.; monocyclic: bicyclic isomer = 95:5;
in neat (no solvent) addn. of boron compd. to equimolar amt. of aminoalkanol, room temp.; driving out CH3NH2 in a stream of Ar, 20-25°C, 18h; distn. (vac.); elem. anal.; monocyclic : bicyclic isomer = 95:5;
