Lewis acid chelation of [NR]2- by 2,2′ -diborabiphenyl: 9,11-diboratacarbazole heterocycles

Article abstract of DOI:10.1021/om049800z

A new heterocyclic framework, the dianionic 9,11-diboratacarbazole, has been prepared from a bis-(trimethylphosphine)-stabilized 2,2′ -diborabiphenyl derivative, 1, and H₂NR (R = Ph., CH ₂C₆H₄-p-OMe). The heterocyclic framework is formally assembled via Lewis acid chelation of the [NR]^2- dianion by 2,2′ -diborabi-phenyl. These dianions are isoelectronic with the well-studied fluorenyl monoanion.