Regioselective Nucleophilic Alkylation/Arylation of B–H Bonds in <i>o</i>-Carboranes: An Alternative Method for Selective Cage Boron Functionalization
作者:Cen Tang、Jiji Zhang、Jie Zhang、Zuowei Xie
DOI:10.1021/jacs.8b10270
日期:2018.12.5
A new protocol for regioselective nucleophilic cage B-H substitution in o-carboranes has been proposed that is complementary to the strategies of transition metal catalysis and electrophilic substitution. Magnesium-mediated site-selective nucleophilic cage B(3,6)-H and B(9)-H substitution reactions of o-carboranes give a series of B(3,6)-dialkylated and B(9)-alkylated/arylated o-carboranes in high
Using readily available and easy-to-handle reagents, a novel type of nido-carborane-fused phosphole was obtained from a simple procedure. Its crystallographic structure was determined, and DFT calculations have been performed, unraveling the key influence of the zwitterionic structure on the photophysical properties.