Boron-Nitrogen Compounds. LXVI1. Aminopyridine-Boranes

摘要

1:1 Molar adducts of 2-aminopyridine, 4-aminopyridine and 2-amino-4-methylpyridine with BH3have been prepared by the reaction of the Lewis bases L with trimethylamine-borane. In all of the resulting products LBH3the pyridyl nitrogen serves as donor site and no species of the type L(BH3)2were observed. In contrast, 2-aminomethylpyridine reacts with BH3only in a 1:2 molar ratio. The expected amine-bisborane was not isolated; rather, under the conditions employed, the species (2-dihydro-borylaminomethylpyridine)-borane, (2-H2B-NH-CH2-C5H4N)BH3, is obtained.