Studies of aminoboranes. Part I. Reactions involving transfer of hydrogen from N-monoalkyl-substituted aminoboranes and amine–boranes to dimethylaminoborane

Abstract

Dimethylaminoborane reacts with trimeric aminoboranes (RNH·BH₂)₃(R = Et and Pr) to give corresponding borazines: Me₂N·BH₂+⅓(RNH·BH₂)₃→ Me₂NH,BH₃+⅓(RNBH)₃ Dimethylaminoborane also reacts with amine–boranes, RNH₂,BH₃(R = Me, Prⁿ, and Prⁱ). From reactions involving propyl- and isopropyl-amine–borane, stable 1,1-dimethyl-3,5-dialkylcyclotriborazanes, which are in effect cyclic mixed adducts, Me₂N·BH₂,2RNH·BH₂, have been obtained.