Iridium Complex-Catalyzed Allylic Alkylation of Allylic Esters and Allylic Alcohols: Unique Regio- and Stereoselectivity
作者:Ryo Takeuchi、Mikihiro Kashio
DOI:10.1021/ja981560p
日期:1998.9.1
An iridiumcomplex was found to be an efficient catalyst for allylicalkylation of allylic esters with a stabilized carbonnucleophile. Highly regioselective alkylation at the substitutedallylic t...
Transmetalation as Key Step in the Diastereo- and Enantioselective Synergistic Cu/Pd-Catalyzed Allylboration of Alkynes with Racemic Allylic Carbonates
Cu/Pd-catalyzedalkyne allylboration with racemic allylic carbonates proceeds with total inversion of configuration. Preliminary studies show that this synergistic catalysis can be used to perform a dynamic asymmetric allylic alkenylation that provides enantioenriched carboboration products.
π-Allylic C1-Substitution in Water with Nitromethane Using Amphiphilic Resin-Supported Palladium Complexes
作者:Yasuhiro Uozumi、Toshimasa Suzuka
DOI:10.1021/jo061250m
日期:2006.10.1
palladium-catalyzed π-allylic substitution in water with amphiphilic PS−PEG resin-supported phosphine−palladium complexes. Catalyticasymmetric nitromethylation of cycloalkenyl esters was achieved in water as a single reaction medium under heterogeneous conditions using 5 mol % palladium of a PS-PEG resin-supported palladium−imidazoindolephosphine complex to give optically active (cycloalkenyl)nitromethanes
π-Allylic Sulfonylation in Water with Amphiphilic Resin-Supported Palladium-Phosphine Complexes
作者:Yasuhiro Uozumi、Toshimasa Suzuka
DOI:10.1055/s-2008-1067096
日期:——
with an amphiphilic polystyrene-poly(ethylene glycol) (PS-PEG) resin-supported phosphine-palladium complex in water as a single reaction medium under heterogeneous conditions to give allyl sulfones in good to high yields. Catalyticasymmetricallylic substitution of cycloalkenyl esters also took place in water using a PS-PEG resin-supported chiral imidazo-indolephosphine-palladium complex to give cycloalkenyl
用两亲性聚苯乙烯-聚(乙二醇)(PS-PEG)树脂负载的膦-钯配合物在水中作为单一反应介质在非均相条件下进行烯丙基酯与芳基亚磺酸钠的 π-烯丙基取代,得到良好的烯丙基砜到高产。环烯基酯的催化不对称烯丙基取代也在水中使用 PS-PEG树脂负载的手性咪唑-吲哚膦-钯络合物进行,得到高达 81% ee 的环烯基砜。
Asymmetric Allylic Amination in Water Catalyzed by an Amphiphilic Resin-Supported Chiral Palladium Complex