An Aluminum Ate Base: Its Design, Structure, Function, and Reaction Mechanism
作者:Hiroshi Naka、Masanobu Uchiyama、Yotaro Matsumoto、Andrew E. H. Wheatley、Mary McPartlin、James V. Morey、Yoshinori Kondo
DOI:10.1021/ja064601n
日期:2007.2.1
base and aromatic, followed by deprotonative formation of the functionalized aromatic aluminum compound. Deprotonation by the TMP ligand rather than the isobutyl ligand was suggested and reasoned by means of spectroscopic and theoretical study. The remarkable regioselectivity of the ortho alumination reaction was explained by a coordinative approximation effect between the functional groups and the counter
Efficient copper-catalyzedtrifluoromethylation of aromatic iodides was achieved with TMSCF3 in the presence of trimethylborate. The Lewis acid was used to anchor the in situ generated trifluoromethyl anion and suppress its rapid decomposition. Broad applicability of the new trifluoromethylating reaction was demonstrated in the functionalization of different aromatic and heteroaromatic iodides.
A method for the regioselective functionalization of haloarenes through deprotonative lithiation is disclosed. The generated haloaryllithiums were trapped in a batch reactor with a zinc chloride diamine complex to provide organozinc species without aryne formation, which reacted with electrophiles to afford the corresponding products in 38–98% yields. This method was applied to the five-step total