Zobrazeno 1 - 10
of 25 722
pro vyhledávání: '"Asymmetric catalysis"'
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 20, Iss 1, Pp 2313-2322 (2024)
The study presents a novel approach utilizing iminium salt activation and mild enolization of thioesters, offering an efficient and rapid synthesis of Michael adducts with promising stereoselectivity and marking a significant advancement in mechanoca
Externí odkaz:
https://doaj.org/article/4c30cb9d200547a8b14b63957bba5d12
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 20, Iss 1, Pp 2349-2377 (2024)
In recent decades, the chiral allylation of imines emerged as a key methodology in the synthesis of alkaloids and natural products with 4-, 5- and 6-membered cyclic amine motifs. Initially reliant on stoichiometric reagents, synthetic chemists predom
Externí odkaz:
https://doaj.org/article/c8c850cfb1cb47cc840f04aa5f17aa0b
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 20, Iss 1, Pp 1794-1799 (2024)
Enantioselective halolactonizations of sterically less hindered alkenoic acid substrates without substituents on the carbon–carbon double bond have remained a formidable challenge. To address this limitation, we report herein the asymmetric bromola
Externí odkaz:
https://doaj.org/article/0d7d1923cde544ed88840e116616e919
Publikováno v:
Green Synthesis and Catalysis, Vol 5, Iss 2, Pp 102-107 (2024)
Heterogeneous asymmetric catalysis is an important strategy for the industrial production of chiral compounds. Herein, we reported a polymer-bound Xu-Phos-derived palladium catalyst that shows good performance in heterogeneous asymmetric reductive He
Externí odkaz:
https://doaj.org/article/cb138307d75f4de28cbaa3c2f348d02f
Autor:
Edward Damer, Prof. Dr. Bernhard Breit
Publikováno v:
ChemistryEurope, Vol 2, Iss 5, Pp n/a-n/a (2024)
Abstract In the growing field of peptidomimetics, there is a constant need for new synthetic methods to generate new bioactive compounds. Herein, we present an atom‐economic approach for the branched‐selective allylation of aliphatic amine moieti
Externí odkaz:
https://doaj.org/article/9496382329524f7a9d446b94c2c49394
Publikováno v:
Advanced Science, Vol 11, Iss 35, Pp n/a-n/a (2024)
Abstract Axially chiral diaryl ethers represent a distinct class of atropisomers, characterized by a unique dual C─O axes system, which have been found in a variety of natural products, pharmaceuticals, and ligands. However, the catalytic enantiose
Externí odkaz:
https://doaj.org/article/5743124817e54e65a3e1c0bf84d56771
Autor:
Kangning Cao, Jie Han, Wenshao Ye, Dejun Hu, Zihao Ye, Junfeng Yang, Junliang Zhang, Fener Chen
Publikováno v:
Advanced Science, Vol 11, Iss 34, Pp n/a-n/a (2024)
Abstract A Pd‐catalyzed enantioselective aminosilylation of alkenes via tandem Aza‐Heck/silylation reaction under Pd/Sadphos catalysis is disclosed. A wide array of oxime esters and silicon reagents are tolerated, furnishing the chiral pyrrolines
Externí odkaz:
https://doaj.org/article/82fd0e9893b140cfac1cbfa534590797
Autor:
Maciej Dajek, Mikołaj J. Janicki, Paulina D. Kubiak, Julia Bąkowicz, Błażej Dziuk, Rafał Kowalczyk
Publikováno v:
Tetrahedron Chem, Vol 12, Iss , Pp 100092- (2024)
The use of thioesters as nucleophiles marks a considerable change in organic synthesis. This new method, propelled by gentle enolization with minimal catalyst loading, results in enantiomeric excesses surpassing 95 % under ambient conditions, accompl
Externí odkaz:
https://doaj.org/article/cb2756d86bd4409c9023dbdcbb230f42
Publikováno v:
Advanced Science, Vol 11, Iss 23, Pp n/a-n/a (2024)
Abstract A novel catalytic system for radical cross‐coupling reactions based on copper and chiral Pyridyl‐bis(imidazole) (PyBim) ligands is described. It overcomes the challenges of chemoselectivity and enantioselectivity, achieving a highly enan
Externí odkaz:
https://doaj.org/article/9c80d08a1cac47c981faf3c5dc2c05dd
Autor:
Hélène Pellissier
Publikováno v:
Chemistry, Vol 6, Iss 1, Pp 98-152 (2024)
This review collects the recent developments in the field of enantioselective scandium-catalyzed transformations published since the beginning of 2016, illustrating the power of chiral scandium catalysts to promote all types of reactions.
Externí odkaz:
https://doaj.org/article/dcb86c6380c64fa5b4e1477cf7d2f4b1