Lewis Acid Chelation of [NR]<sup>2</sup><sup>-</sup> by 2,2‘-Diborabiphenyl: 9,11-Diboratacarbazole Heterocycles
作者:Ioan Ghesner、Warren E. Piers、Masood Parvez、Robert McDonald
DOI:10.1021/om049800z
日期:2004.6.1
framework, the dianionic 9,11-diboratacarbazole, has been prepared from a bis(trimethylphosphine)-stabilized 2,2‘-diborabiphenyl derivative, 1, and H2NR (R = Ph, CH2C6H4-p-OMe). The heterocyclic framework is formally assembled via Lewisacid chelation of the [NR]2- dianion by 2,2‘-diborabiphenyl. These dianions are isoelectronic with the well-studied fluorenyl monoanion.