Progress in organocatalytic asymmetric (4+ 3) cycloadditions for the enantioselective construction of seven-membered rings

W Tan, JY Zhang, CH Gao, F Shi - Science China Chemistry, 2023 - Springer
Chiral seven-membered ring systems such as seven-membered carbocycles and
heterocycles are widely found in natural products and pharmaceuticals. Therefore, the …

An update on chiral phosphoric acid organocatalyzed stereoselective reactions

EI Jiménez - Organic & Biomolecular Chemistry, 2023 - pubs.rsc.org
Chiral Phosphoric Acids (CPAs) are a highly versatile class of Brønsted acid organocatalysts
that have witnessed a surge in their use in asymmetric synthesis in recent years. Various …

Regio‐and Enantioselective (3+ 3) Cycloaddition of Nitrones with 2‐Indolylmethanols Enabled by Cooperative Organocatalysis

TZ Li, SJ Liu, YW Sun, S Deng, W Tan… - Angewandte Chemie …, 2021 - Wiley Online Library
Abstract The regio‐and enantioselective (3+ 3) cycloaddition of nitrones with 2‐
indolylmethanols was accomplished by the cooperative catalysis of hexafluoroisopropanol …

Ruthenium‐Catalyzed Direct Asymmetric Reductive Amination of Diaryl and Sterically Hindered Ketones with Ammonium Salts and H2

L Hu, Y Zhang, QW Zhang, Q Yin… - Angewandte Chemie …, 2020 - Wiley Online Library
A Ru‐catalyzed direct asymmetric reductive amination of ortho‐OH‐substituted diaryl and
sterically hindered ketones with ammonium salts is reported. This method represents a …

Transition‐Metal‐Free Hydrogen Autotransfer: Diastereoselective N‐Alkylation of Amines with Racemic Alcohols

M **ao, X Yue, R Xu, W Tang, D Xue, C Li… - Angewandte …, 2019 - Wiley Online Library
A practical method for the synthesis of α‐chiral amines by alkylation of amines with alcohols
in the absence of any transition‐metal catalysts has been developed. Under the co‐catalysis …

Synthesis of Chiral Diarylmethylamines by Cobalt‐Catalyzed Enantioselective C‐H Alkoxylation

ZK Wang, YJ Wu, QJ Yao, BF Shi - … Chemie International Edition, 2023 - Wiley Online Library
Chiral diarylmethylamines (DAMA) are important structural motifs widely present in
pharmaceuticals, natural products, and chiral ligands. Herein, we reported a highly …

Asymmetric Catalytic [4+5] Annulation of ortho‐Quinone Methides with Vinylethylene Carbonates and its Extension to Stereoselective Tandem Rearrangement

XT An, JY Du, ZL Jia, Q Zhang, KY Yu… - … A European Journal, 2020 - Wiley Online Library
Abstract Palladium‐catalyzed asymmetric [4+ 5] annulation of ortho‐quinone methides (o‐
QMs) with substituted vinylethylene carbonates (VECs) is described for the first time, giving a …

Organocatalytic C3-functionalization of indolizines: synthesis of biologically important indolizine derivatives

YZ Zhang, FT Sheng, Z Zhu, ZM Li, S Zhang… - Organic & …, 2020 - pubs.rsc.org
A Brønsted acid-catalyzed C3-alkylation of indolizines has been established with different
electrophiles such as ortho-hydroxybenzyl alcohols, other precursors of para-quinone …

Organocatalytic Asymmetric Synthesis of o-Carboranyl Amines

HL Xu, M Zhu, HHY Sung, ID Williams… - Journal of the …, 2025 - ACS Publications
Carboranyl amines are distinct from typical organic amines. Due to the electronic influence
of the carborane cage, they have low nucleophilicity and are reluctant to alkylate. Moreover …

High-throughput classical chiral resolution screening of synthetic intermediates: effects of resolving agents, crystallization solvents, and other factors

J Qiu, JM Stevens - Organic Process Research & Development, 2020 - ACS Publications
Using a statistical Z-score methodology, enantiomeric excess (ee) data from our historical
high-throughput classical chiral resolution screens were analyzed. In total, 19 of the screens …