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.); standing at room temp.; crystn. of bicyclic isomer; elem. anal.;

in neat (no solvent) byproducts: CH3NH2; mixt. heated, 70-150°C with stirring, under Ar, 9 h, CH3NH2 collected in H2SO4; distn. (vac.); elem. anal.;