Further developments and applications of oxazoline-containing ligands in asymmetric catalysis

R Connon, B Roche, BV Rokade, PJ Guiry - Chemical Reviews, 2021 - ACS Publications
The chiral oxazoline motif is present in many ligands that have been extensively applied in a
series of important metal-catalyzed enantioselective reactions. This Review aims to provide …

Transition Metal‐Catalyzed Enantioselective Synthesis of Chiral Five‐ and Six‐Membered Benzo O‐heterocycles

L Yang, X Liang, Y Ding, X Li, X Li… - The Chemical …, 2023 - Wiley Online Library
Enantiomerically enriched five‐and six‐membered benzo oxygen heterocycles are
privileged architectures in functional organic molecules. Over the last several years, many …

Photoinduced Copper‐Catalyzed Coupling of Terminal Alkynes and Alkyl Iodides

A Hazra, MT Lee, JF Chiu, G Lalic - Angewandte Chemie, 2018 - Wiley Online Library
We have developed a photoinduced copper‐catalyzed alkylation of terminal alkynes with
primary, secondary, or tertiary alkyl iodides as electrophiles. The reaction has a broad …

Enantioselective Copper‐Catalyzed Quinoline Alkynylation

M Pappoppula, FSP Cardoso, BO Garrett… - Angewandte …, 2015 - Wiley Online Library
A highly enantioselective copper‐catalyzed alkynylation of quinolinium salts is reported. The
reaction employs StackPhos, a newly developed imidazole‐based chiral biaryl P, N ligand …

Asymmetric catalysis via cyclic, aliphatic oxocarbenium ions

S Lee, PSJ Kaib, B List - Journal of the American Chemical …, 2017 - ACS Publications
A direct enantioselective synthesis of substituted oxygen heterocycles from lactol acetates
and enolsilanes has been realized using a highly reactive and confined …

Catalytic Enantioselective Alkyne Addition to Nitrones Enabled by Tunable Axially Chiral Imidazole-Based P, N-Ligands

S Yin, KN Weeks, A Aponick - Journal of the American Chemical …, 2024 - ACS Publications
Although catalytic enantioselective alkyne addition is an established method for the
synthesis of chiral propargylic alcohols and amines, addition to nitrones presents unique …

A facile enantioselective alkynylation of chromones

LG DeRatt, M Pappoppula… - Angewandte Chemie …, 2019 - Wiley Online Library
The first catalytic enantioselective alkynylation of chromones is reported. In this process,
chromones are silylated to form silyloxybenzopyrylium ions that lead to silyl enol ethers after …

Asymmetric Induction via a Helically Chiral Anion: Enantioselective Pentacarboxycyclopentadiene Brønsted Acid-Catalyzed Inverse-Electron-Demand Diels–Alder …

CD Gheewala, JS Hirschi, WH Lee… - Journal of the …, 2018 - ACS Publications
An enantioselective catalytic inverse-electron-demand Diels–Alder reaction of
salicylaldehyde acetal-derived oxocarbenium ions and vinyl ethers to generate 2, 4 …

Recent developments in asymmetric alkynylations

V Bisai, VK Singh - Tetrahedron Letters, 2016 - Elsevier
Catalytic asymmetric syntheses of enantioenriched propargyl alcohols and amines have
been a central topic in organic synthesis. Toward this, a great deal of research has been put …

Enantioselective Copper (I)‐Catalyzed Alkynylation of Oxocarbenium Ions to Set Diaryl Tetrasubstituted Stereocenters

S Dasgupta, T Rivas, MP Watson - … Chemie International Edition, 2015 - Wiley Online Library
Abstract An enantioselective, copper (I)‐catalyzed addition of terminal alkynes to
isochroman ketals to set diaryl, tetrasubstituted stereocenters has been developed. The …