of the library gave some excellent catalysts for regioselectivehydroformylation of β,γ‐unsaturatedcarboxylicacids. A terminal alkene, but‐3‐enoic acid, was hydroformylated with a linear/branched (l/b) regioselectivity up to 41. An internal alkene, pent‐3‐enoic acid was hydroformylated with regioselectivity up to 18:1. Further substrate selectivity (e.g., acid vs. methyl ester) and reaction site
Nickel‐Catalyzed Kinetic Resolution of Racemic Unactivated Alkenes via Enantio‐, Diastereo‐, and Regioselective Hydroamination
作者:Hyung‐Joon Kang、Changseok Lee、Sungwoo Hong
DOI:10.1002/anie.202305042
日期:2023.6.12
An efficient enantioselective catalysis using a chiral nickel complex has been developed via kinetic resolution of racemic α-substituted unconjugated carbonyl alkenes. This hydroamination protocol produces a wide range of syn-β2,3-amino acid derivatives derivatives and α-alkylated unconjugated carbonyl olefins with high enantiomeric purity.
Palladium-catalyzed synthesis of mixed anhydrides <i>via</i> carbonylative telomerization
作者:Kevin Hares、Dennis Vogelsang、Charlotte S. Wernsdörfer、Dennis Panke、Dieter Vogt、Thomas Seidensticker
DOI:10.1039/d2cy00486k
日期:——
mixed carboxylic anhydrides were accessed directly via homogeneous palladium catalysis from 1,3-butadiene and carboxylic acids. Under carbonylative telomerization conditions, the respective mixed 3,8-nonadienoic anhydrides are formed in a single reaction step with yields of up to 82%. These very reactive mixed anhydrides can then be used for consecutive reactions in a one-pot manner and selectively transfer
Ligand-Controlled Regiodivergent Ni-Catalyzed Reductive Carboxylation of Allyl Esters with CO<sub>2</sub>
作者:Toni Moragas、Josep Cornella、Ruben Martin
DOI:10.1021/ja509077a
日期:2014.12.24
A novel Ni-catalyzed regiodivergent reductive carboxylation of allyl esters with CO2 has been developed. This mild, user-friendly, and operationally simple method is characterized by an exquisite selectivity profile that is dictated by the ligand backbone.
Nickel-Catalyzed Multicomponent Coupling of Alkyne, Buta-1,3-diene, and Dimethylzinc under Carbon Dioxide