O,N,B-Containing eight-membered heterocycles by ring expansion of boroles with nitrones.
By a ring expansion reaction of boroles with nitrones a straightforward route to eight-membered O,N,B-containing ring systems was developed, which present a new structural motif in heterocyclic chemistry. Formally, these compounds can be considered as BN-analogues of eight-membered ring ethers containing three double bonds. The X-ray crystallographic data of a series of these oxazaborocine derivatives show that they adopt a boat conformation in the solid state.
Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@uni-wuerzburg.de.
Holger
H
Braunschweig
Ivo
I
Krummenacher
Lisa
L
Mailänder
Florian
F
Rauch
D001896:Boron Compounds / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006571:Heterocyclic Compounds / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry*
D001896:Boron Compounds; D006571:Heterocyclic Compounds; D009589:Nitrogen Oxides; C015388:nitrones