71809-03-5Relevant articles and documents
Enantiopure pseudo-C3-symmetric titanium alkoxide with propeller-like chirality
Axe, Philip,Bull, Steven D.,Davidson, Matthew G.,Gilfillan, Carly J.,Jones, Matthew D.,Robinson, Diane E. J. E.,Turner, Luke E.,Mitchell, William L.
, p. 223 - 226 (2007)
(Chemical Equation Presented) An enantiopure amine tris(phenolate) ligand containing a single stereogenic center has been used to control the propeller-like chirality of a derived pseudo-C3-symmetric titanium isopropoxide complex with excellent
Sterically hindered selenoether ligands: Palladium(ii) complexes as catalytic activators for Suzuki-Miyaura coupling
Kumar, Umesh,Dubey, Pooja,Singh, Ved Vati,Prakash, Om,Singh, Ajai K.
, p. 41659 - 41665 (2014)
2-Hydroxy/(benzyloxy)-3,5-di-tert-butyl benzaldehyde reacts with PhSeCH2CH2NH2resulting in a sterically hindered selenoether ligand (Schiff base) [2-HO-3,5-(C(CH3)3)2-C6H2/
Bulky Selenium Ligand Stabilized Trans-Palladium Dichloride Complexes as Catalyst for Silver-Free Decarboxylative Coupling of Coumarin-3-Carboxylic Acids
Meena, Neha,Kumar, Sunil,Shinde, Vikki N.,Reddy, S. Rajagopala,Himanshi,Bhuvanesh, Nattamai,Kumar, Anil,Joshi, Hemant
supporting information, (2022/01/11)
This report describes the syntheses of three new trans-palladium dichloride complexes of bulky selenium ligands. These complexes possess a Cl?Pd?Cl rotor spoke attached to a Se?Pd?Se axle. The new ligands and palladium complexes (C1?C3) were characterized with the help of NMR, HRMS, UV-Vis., IR, and elemental analysis. The single-crystal structure of metal complex C2 confirmed a square planar geometry of complex with trans-orientation. The X-ray structure revealed intramolecular secondary interactions (SeCH—Cl) between chlorine of PdCl2 and CH2 proton of selenium ligand. Variable-temperature NMR data shows coalescence of diastereotopic protons, which indicates pyramidal inversion of selenium atom at elevated temperature. The relaxed potential energy scan of C2 suggests a rotational barrier of ～12.5 kcal/mol for rotation of chlorine atom through Cl?Pd?Cl rotor. The complex C3 possesses dual intramolecular secondary interactions (OCH2—Cl and SeCH2—Cl) with stator ligand. Molecular rotor C2 was found to be a most efficient catalyst for the decarboxylative Heck-coupling under mild reaction conditions. The protocol is applicable to a broad range of substrates with large functional group tolerance and low catalyst loading (2.5 mol %). The mechanism of decarboxylative Heck-coupling reaction was investigated through experimental and computational studies. Importantly the reaction works under silver-free conditions which reduces the cost of overall protocol. Further, the catalyst also worked for decarboxylative arylation and decarboxylative Suzuki-Miyaura coupling reactions with good yields of the coupled products.
Side-bridged cyclam transition metal complexes bearing a phenolic ether or a phenolate pendent arm
Mewis, Ryan E.,Archibald, Stephen J.
, p. 578 - 589 (2019/09/03)
Side-bridged cyclam transition metal complexes (M = Ni(II), Cu(II) and Zn(II)) bearing a phenolic ether or phenolate pendent arm have been synthesised. For [NiL1]+ and [CuL1]+, evidence for a phenoxyl radical wa
Synthesis of Tr?ger's base derived ligands: PHZ-derivatized ligand with pendant donor arms
Hampton, Carissa S.,Harmata, Michael
, p. 6064 - 6077 (2016/09/16)
A cyclic diamine ligand whose core structure was derived from Tr?ger's base, and included additional pendant arms containing ancillary donor coordination sites was prepared and coordination with transition metals attempted.
Sterically hindered selenoether ligands: Palladium(ii) complexes as catalytic activators for Suzuki-Miyaura coupling
Kumar, Umesh,Dubey, Pooja,Singh, Ved Vati,Prakash, Om,Singh, Ajai K.
, p. 41659 - 41665 (2015/05/20)
2-Hydroxy/(benzyloxy)-3,5-di-tert-butyl benzaldehyde reacts with PhSeCH2CH2NH2 resulting in a sterically hindered selenoether ligand (Schiff base) [2-HO-3,5-(C(CH3)3)2-C6H2
Inserting a hydrogen-bond relay between proton exchanging sites in proton-coupled electron transfers
Costentin, Cyrille,Robert, Marc,Saveant, Jean-Michel,Tard, Cedric
supporting information; experimental part, p. 3803 - 3806 (2010/09/03)
(Figure Presented) Take the "H-bond" train: Introduction of a hydrogen-bond relay efficiently mediates the electron-transfer triggered exchange of protons between two sites over large distances (see picture). Thanks to this concerted proton-electron trans
