The use of aryl triflates to form arynes as reactive intermediates is described. This allows the first general use of phenols as aryne precursors. Phenyl triflate reacts with LDA at - 78-degrees-C to form benzyne, which then reacts with diisopropylamine generating N,N-diisopropylaniline. Yields of diisopropylarylamines from aryne intermediates are superior to those previously reported. Regioisomeric ratios are similar to those obtained with use of other benzyne precursors.
The anionic thia-Fries rearrangement of aryl triflates
作者:Jonathan P. H. Charmant、Alan M. Dyke、Guy C. Lloyd-Jones
DOI:10.1039/b210648e
日期:2003.1.23
Aryl triflates undergo LDA-mediated rearrangement to generate o-hydroxyaryl trifluoromethylsulfones. In some cases, partitioning between rearrangement and aryne generation can be controlled.
Thermal and Photochemical Electron-Transfer Reactions of 4-Chlorobiphenyl with Lithium Diisopropylamides and Diisopropylamine
作者:Yoshio Tanaka、Kazuo Tsujimoto、Mamoru Ohashi
DOI:10.1246/bcsj.60.788
日期:1987.2
A reaction of 4-chlorobiphenyl with lithium diisopropylamide in a polar solvent gave 3- and 4-(diisopropylamino)biphenyl together with biphenyl, similar to the case of photoinduced reactions of 4-chlorobiphenyl with diisopropylamine. A common electron-transfer mechanism is proposed.