Tandem Catalytic Allylic Amination and [2,3]-Stevens Rearrangement of Tertiary Amines
作者:Arash Soheili、Uttam K. Tambar
DOI:10.1021/ja204717b
日期:2011.8.24
have developed a catalytic allylic amination involving tertiary aminoesters and allylcarbonates, which is the first example of the use of tertiary amines as intermolecular nucleophiles in metal-catalyzed allylic substitution chemistry. This process is employed in a tandem ammonium ylide generation/[2,3]-rearrangement reaction, which formally represents a palladium-catalyzed Stevens rearrangement. Low
N-Heterocyclic Carbene C,S Palladium(II) π-Allyl Complexes: Synthesis, Characterization, and Catalytic Application In Allylic Amination Reactions
作者:Deepa Krishnan、Meiyi Wu、Minyi Chiang、Yongxin Li、Pak-Hing Leung、Sumod A. Pullarkat
DOI:10.1021/om400110t
日期:2013.4.22
carbene C,S palladium(II) π-allylcomplexes were successfully developed and characterized. Structural analyses of these complexes revealed that the organopalladium chelates adopt a skew-envelope conformation with a trans disposition of the substituents on the metal chelate rings. Utilizing these C,S palladium(II) π-allylcomplexes as catalysts, a catalytic system for the allylic amination reaction has
Synthetic Applications of the Carbanion with a Fluoroalkyl Group Generated by Palladium(0) Catalyst under Neutral Conditions
作者:Yuzo Komatsu、Toru Sakamoto、Tomoya Kitazume
DOI:10.1021/jo990463r
日期:1999.10.1
fluorine atom(s) are described. Palladium(0)-catalyzedallylation reactions under neutral conditions proceeded smoothly in the system where a methylene group is activated by fluoroalkyl and carbonyl groups. In the above systems, the 2,2,2-trifluoroethyl moiety has been introduced onto the allylic position without the release of fluoride. Further, palladium(0)-catalyzed heterocyclization was achieved
Regioselectivity and memory effects in palladium catalyzed allylic alkylations with bidentate P^PS donor ligands
作者:Suzanna C. Milheiro、J.W. Faller
DOI:10.1016/j.jorganchem.2010.10.022
日期:2011.2
bidentate bisphosphine monosulfide ligands, were found to catalyze allylicalkylation reactions with high branched:linear selectivity with some ligands. Some of these catalysts also display a regiochemical memory effect, in which the hemilability and rigidity of the P^PS ligands affect the reaction rate and the degree to which a memory effect is observed.
A novel and efficient strategy for one-step synthesis of allylated quinolines and isoquinolines via palladium-catalyzed cyclization-allylation of azides and allyl methyl carbonate is developed for the first time. The results indicated that the regioselective synthesis of allyl- and diallyl-substituted quinolines/isoquinolines depends on different substituted groups at R(1) and R(4) positions, such