in hexane N2-atmosphere; addn. of 2 equiv. AlEt3 to borane (-78°C), stirring (room temp., 20 h); not isolated, reaction followed by (11)B- and (27)Al-NMR spectroscopy;

in not given byproducts: Me2NH; N2-atmosphere; 2 equiv. i-PrOH, stirring (room temp., <= 30 min); in CH2Cl2 or pentane or Et2O (not specified); product mixt. not isolated, detd. by (11)B-NMR spectroscopy;

in hexane N2-atmosphere; addn. of 2 equiv. AlEt3 to borane (-78°C), stirring (room temp., 20 h); not isolated, reaction followed by (11)B- and (27)Al-NMR spectroscopy;

in hexane N2-atmosphere; addn. of 1 equiv. AlEt3 to borane (-78°C), stirring (room temp., 1 d); not isolated, reaction followed by (11)B- and (27)Al-NMR spectroscopy;