Azaborines: synthesis and use in the generation of stabilized boron-substituted carbocations

作者：Clarke J J; Eisenberger P^*; Piotrkowski S S; Crudden C M^*

来源：Dalton Transactions, 2018, 47(6): 1791-1795.

DOI：10.1039/c7dt01329a

A formal N-heterocyclic carbene insertion into the B-H bond of 9-BBN followed by a ring expansion reaction is reported. NHC-9BBN adducts were reacted in one or two steps to give the corresponding di-or triazaborines. Hydride abstraction of selected species with [Ph3C](+) is facile, giving rise to 6 pi-aromatic cations with Lewis acidity comparable to Lewis acids commonly employed in frustrated Lewis pairs.

• 出版日期2018-2-14