Copper-catalyzed arylstannylation of arynes in a sequence
作者:Hideya Tanaka、Hitoshi Kuriki、Teruhiko Kubo、Itaru Osaka、Hiroto Yoshida
DOI:10.1039/c9cc02738f
日期:——
Copper-catalyzed arylstannylation of arynes has been developed. This transformation enables variously substituted ortho-stannylbiaryls and teraryls to be constructed straightforwardly. An electron-deficient tin center is the key, and thus the single or dual insertion of arynes into arylstannanes is precisely controllable by simply changing the equivalence of aryne precursors.
Stille Cross-Coupling Reactions of Aryl Mesylates and Tosylates Using a Biarylphosphine Based Catalyst System
作者:Stephen L. Buchwald、John R. Naber、Brett P. Fors、Xiaoxing Wu、Jonathon T. Gunn
DOI:10.3987/com-09-s(s)105
日期:——
A catalystsystem for the Stillecross-couplingreactions of aryl mesylates and tosylates is reported. Using the combination of Pd(OAc)2, XPhos, and CsF in t-BuOH an array of aryl and heteroaryl sulfonates were successfully employed in these reactions. Morever, heteroarylstannanes, such as furyl, thiophenyl, and N-methylpyrrole, which are often prone to decomposition, were efficiently coupled under
Palladium-Catalyzed Stille Cross-Coupling Reaction of Aryl Chlorides using a Pre-Milled Palladium Acetate and XPhos Catalyst System
作者:John R. Naber、Stephen L. Buchwald
DOI:10.1002/adsc.200800032
日期:2008.5.5
highly active catalystsystem based upon a biaryl monophosphine ligand, XPhos, for the palladium-catalyzedStillereaction has been developed. This method allows for the coupling of arylchlorides with a range of tributylarylstannanes to produce the corresponding biaryl compounds in good to excellent yields (61–98%) in short reaction times (4 h). Palladium(II) acetate [Pd(OAc)2] and XPhos in a 1:1.1 ratio