Spiro-fused six-membered N-heterocyclic carbene: a new scaffold toward unique properties and activities.
A six-membered N-heterocyclic carbene fused with a spiro-scaffold is designed. The new NHC shows stronger σ-donation ability than typical 5-membered NHCs. This property leads to interesting reactivities of this spiro-fused six-membered NHC. For example, the NHC-BF3 Lewis pair complex can be readily prepared by using LiBF4 as the BF3 source, or through a direct bond-reconstruction of the tetrafluoroborate salt NHC·HBF4.
State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China. tuyq@lzu.edu.cn.
Bin-Miao
BM
Yang
Kai
K
Xiang
Yong-Qiang
YQ
Tu
Shi-Heng
SH
Zhang
Deng-Tao
DT
Yang
Shao-Hua
SH
Wang
Fu-Ming
FM
Zhang