Enantioselective Organo-Singly Occupied Molecular Orbital Catalysis: The Carbo-oxidation of Styrenes
作者:Thomas H. Graham、Casey M. Jones、Nathan T. Jui、David W. C. MacMillan
DOI:10.1021/ja8075633
日期:2008.12.10
The first enantioselective organocatalytic carbo-oxidation of styrenes has been accomplished using singly occupied molecular orbital (SOMO) catalysis. Geometrically constrained radical cations are generated from the one-electron oxidation of enamines formed from the condensation of aldehydes with a secondaryamine catalyst. These SOMO-activated radical cations are susceptible to attack by commercially
Aluminum(III) Salen Complexes as Active Photoredox Catalysts
作者:Andrea Gualandi、Marianna Marchini、Luca Mengozzi、Hagos Tesfay Kidanu、Antoine Franc、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1002/ejoc.201901086
日期:2020.3.15
A benchmark photoredox alkylation of aldehydes is effectively promoted by using 5 mol‐% of the commercially available [Al(Salen)Cl], in the presence of a MacMillan organocatalyst (14 mol‐%) under irradiation with a CFL light bulb.
THE PREPARATION OF (2R,5S)-2-t-BUTYL-3,5-DIMETHYLIMIDAZOLIDIN-4-ONE
作者:Graham, Thomas H.、Horning, Benjamin D.、MacMillan, David W. C.
DOI:10.15227/orgsyn.088.0042
日期:——
Organocatalytic regiospecific synthesis of 1H-indene-2-carbaldehyde derivatives: suppression of cycloolefin isomerisation by employing sterically demanding catalysts
作者:Hui Mao、Dong Wan Kim、Hun Yi Shin、Choong Eui Song、Jung Woon Yang
DOI:10.1039/c6ob01918h
日期:——
The regiospecific synthesis of 1H-indene-2-carbaldehyde derivatives was achieved through transition-metal-free, reductive cyclisation of ortho-formyl trans-cinnamaldehydes with Hantzsch ester in the presence of an aminocatalyst. In particular, cycloolefin isomerisation of the resulting products could be inhibited efficiently by the introduction of a stericallydemanding stereo-defined aminocatalyst
Lead-halide perovskite quantum dots embedded in mesoporous silica as heterogeneous photocatalysts combined with organocatalysts for asymmetric catalysis
environments. Hence, we embedded CsPbBr3 quantum dots into KIT-6 mesoporous silica to form silica-shell-protected heterogeneous photocatalysts (CsPbBr3@KIT-6), which were further combined with chiral organocatalysts to explore the activity and stereoselectivity in asymmetric photocatalysis. The well-dispersed CsPbBr3 in KIT-6 channels provides more active sites and exhibits excellent enantioselectivity