120522-83-0Relevant articles and documents
Bis(imino)pyridine iron complexes for catalytic carbene transfer reactions
Wang, Ban,Howard, Isaac G.,Pope, Jackson W.,Conte, Eric D.,Deng, Yongming
, p. 7958 - 7963 (2019)
The bis(imino)pyridine iron complex, for the first time, is developed as an effective metal carbene catalyst for carbene transfer reactions of donor-acceptor diazo compounds. Its broad catalytic capability is demonstrated by a range of metal carbene reactions, from cyclopropanation, cyclopropenation, epoxidation, and Doyle-Kirmse reaction to O-H insertion, N-H insertion, and C-H insertion reactions. The asymmetric cyclopropanation of styrene and methyl phenyldiazoacetate was successfully achieved by the new chiral bis(imino)pyridine iron catalyst, which delivers a new gateway for the development of chiral iron catalysis for metal carbene reactions.
Cu-iminopyridine complexes as catalysts for carbene and nitrene transfer reactions
Abedi, Yaghoub,Biffis, Andrea,Gava, Riccardo,Tubaro, Cristina,Chelucci, Giorgio,Stoccoro, Sergio
, p. 512 - 516 (2014)
Copper complexes with chiral iminopyridine ligands were screened for their catalytic efficiency in carbene (cyclopropanation) and nitrene transfer reactions (aziridination, CH amidation). Both pre-formed and in situ formed complexes were considered. The r
Catalytic Asymmetric Cyclopropanation Using Bridged Dirhodium Tetraprolinates on Solid Support
Nagashima, Tadamichi,Davies, Huw M. L.
, p. 1989 - 1992 (2002)
(Matrix Presented) Dirhodium tetraprolinates in highly cross-linked macroporous polystyrene resins are very effective catalysts for asymmetric cyclopropanation using methyl aryldiazoaceates.
Effect of catalyst on the diastereoselectivity of methyl phenyldiazoacetate cyclopropanations
Davies, Huw M. L.,Rusiniak, Leatte
, p. 8811 - 8812 (1998)
In contrast to previously published studies, the diastereoselectivity of phenyldiazoacetate cyclopropanations is not greatly altered by the type of rhodium carboxylate catalyst that is used.
Polynuclear copper(I) complexes with chelating bis- and tris-N-heterocyclic carbene ligands: Catalytic activity in nitrene and carbene transfer reactions
Tubaro, Cristina,Biffis, Andrea,Gava, Riccardo,Scattolin, Elena,Volpe, Andrea,Basato, Marino,Diaz-Requejo, M. Mar,Perez, Pedro J.
, p. 1367 - 1372 (2012)
Di- and trinuclear complexes of copper(I) bearing bis- or tris-N-heterocyclic carbene ligands have been prepared and evaluated as catalysts in nitrene transfer reactions from PhI=NTs to unsaturated and saturated substrates (olefin aziridination and C-H bond amidation) and carbene transfer reactions from diazo compounds to olefins. The complexes exhibited moderate-to-high catalytic activity in both processes. The tosylamidation of C-H bonds, previously unreported with a NHC-containing copper catalyst, was promoted by the dinuclear complexes. Polynuclear oligo-NHC-copper complexes catalyse the transfer of carbene or nitrene fragments to unsaturated and saturated substrates. The first example of the tosylamidation of C-H bonds with a catalyst containing the NHCCu core is described. Copyright
Simple Strategy for the Immobilization of Dirhodium Tetraprolinate Catalysts Using a Pyridine-Linked Solid Support
Davies, Huw M. L.,Walji, Abbas M.,Nagashima, Tadamichi
, p. 4271 - 4280 (2004)
Dirhodium tetracarboxylates are readily immobilized on agitation in the presence of highly cross-linked polystyrene resins with a pyridine attachment. A systematic study demonstrates that the polymer backbone, the linker, the terminal pyridine group, and
A fluorous chiral dirhodium(II) complex as a recyclable asymmetric catalyst
Biffis, Andrea,Braga, Mirko,Cadamuro, Sara,Tubaro, Cristina,Basato, Marino
, p. 1841 - 1844 (2005)
(Chemical Equation Presented) The chiral fluorous complex tetrakis-dirhodium(II)-(S)-N-(n-perfluorooctylsulfonyl)prolinate has been prepared and used as a catalyst in homogeneous or fluorous biphasic fashion. The catalyst displays good chemo- and enantios
Blue light-promoted N–H insertion of amides, isatins, sulfonamides and imides into aryldiazoacetates: Synthesis of unnatural α-aryl amino acid derivatives
Okada, Celso Y.,dos Santos, Caio Y.,Jurberg, Igor D.
, (2020/07/03)
A photochemical protocol using blue light allows the N–H insertion of amides, isatins, sulfonamides and imides into aryldiazoacetates to afford the corresponding α-amino esters. This method is experimentally simple, inexpensive and tolerates numerous functional groups, thus allowing the straightforward preparation of a variety of α-aryl amino acid derivatives in good yields.
Synthesis of Chiral Bifunctional NHC Ligands and Survey of Their Utilities in Asymmetric Gold Catalysis
Liu, Yunkui,Wang, Xing-Wang,Zhang, Jun-Qi,Zhang, Liming
supporting information, (2019/08/26)
The synthesis and characterization of the chiral bifunctional NHC ligands based on the imidazo[1,5-a]pyridine (ImPy) scaffold are described. These ligands possess a fluxional biaryl axis and a chiral center. The configurational stability of the biaryl axis in their gold(I) complexes is investigated. The application of these axially chiral ImPy-based AuCl complexes in a series of gold catalysis is explored, and varying degrees of asymmetric induction are observed. In most cases, the ligand (aS,R)-L8-H with its cyclohexyl group pointing to the reaction site and hence exerting asymmetric steric influence is more effective in asymmetric induction.
