189265-14-3Relevant academic research and scientific papers
Bis(diorganylamino)dihalodiboroxanes as building blocks for boron heterocycles
Maringgele, Walter,Noltemeyer, Mathias,Meller, Anton
, p. 2276 - 2284 (2008/10/08)
Bis(diorganylamino)dihalo-1,3-diboroxanes 1 result from the controlled hydrolysis of (diorganylamino)dihaloboranes substituted with bulky dialkyl- or alkylarylamino groups. Dehalogenation with sodium/potassium alloy gives 1,4-dioxa-2,3,5,6-tetraborinanes 3 and, in the case of the di(s-butyl)amino groups, the corresponding oxadiborirane 4. If the dehalogenation is carried out in the presence of bi- or tricyclic aromatic compounds, addition of a B(NR2)OB(NR2) moiety is observed, and the corresponding 1,3-(1,2-dihydronaphthaline-1,2-diyl)diboroxane (5), 1,3-(9,10-dihydroanthracene-9,10-diyl)diboroxane (6), and 1,3-(9,10-dihydrophenanthrene-9,10-diyl)diboroxane (7) species are obtained. The compounds were characterized by NMR spectroscopy OH, 11B, 13C), MS (EI and FI), and elemental analyses. X-ray crystal structure determinations are presented for 1a, 3a, 5a, and 6b.
