137479-24-4Relevant academic research and scientific papers
Cyclization of Amidoximes with Oxybis(diphenylborane)
Moehrle, Hans,Bluhme-Hensen, Karin,Middelhauve, Birgit,Mootz, Dietrich,Wunderlich, Hartmut
, p. 1219 - 1222 (2007/10/02)
Amidoximes, 2,3-Dihydro-1,3,5,2-oxadiazaborol Derivatives, Crystal Structure Substituted amidoximes when reacted with oxybis(diphenylborane) do not yield ester chelates as main products but boron heterocycles.The compound obtained from p-toluamidoxime was found by crystal structure analysis to be 2-phenyl-4-(4-methylphenyl)-2,3-dihydro-1,3,5,2-oxadiazaborol (9).The conformation of the molecule is determined by angles of 29.1 and 24.4 deg between the planes of adjacent rings.Except N-O all bonds in the heterocyclic ring contain significant ? character.Molecules are linked to chains by a weak bifurcated hydrogen bond. 9 crystallizes with the monoclinic space group P21/c, Z = 4, a = 5.574(2), b = 18.274(4), c = 12.754(4) Angstroem, β = 106.41(2) deg.Refinement of 227 parameters using 1709 observed reflections converged at R = 0.037.
