ChemInform Abstract: Boron Compounds. Part 75. N-Substituted 4,5-Diethyl-2,5-dihydro-2,2,3-trimethyl-1,2,5-azasilaboroles. Preparation and Characterization.

ChemInform Abstract

Starting with the sodiumborate (I) the alkali metal 1,2,5-azoniasilaboratoles (V) are obtained via (III). Elimination of ethane forms (VI). From (VIa) the NH compound (IX) and NMe compound (VIII) is prepared. (VIa) reacts also with a series of chlorides to yield the N-substituted products (XII)-(XV). Transamination reactions of (VIII) with primary amines and diamines produce the derivatives (XVI)and (XIX), respectively. (VIII) and monoorganohydrazines react under transamination to give mixtures of (XXI) and the isomeric diazasilaborines (XXII) and (XXIII). The compounds are characterized by IR, NMR and mass spectroscopic data. The structure of (XIVa) is determined by an X-ray analysis (space group P2₁/c, Z=2).