N‐Heterocyclic Carbene Catalysis via Azolium Dienolates: An Efficient Strategy for Remote Enantioselective Functionalizations

XY Chen, Q Liu, P Chauhan… - Angewandte Chemie …, 2018 - Wiley Online Library
N‐heterocyclic carbene (NHC) catalysis has emerged as a powerful strategy in organic
synthesis. In recent years a number of reviews have been published on NHC‐catalyzed …

Additive effects on asymmetric catalysis

L Hong, W Sun, D Yang, G Li, R Wang - Chemical Reviews, 2016 - ACS Publications
This review highlights a number of additives that can be used to make asymmetric reactions
perfect. Without changing other reaction conditions, simply adding additives can lead to …

The diarylprolinol silyl ethers: ten years after

BS Donslund, TK Johansen, PH Poulsen… - Angewandte Chemie …, 2015 - Wiley Online Library
Asymmetric organocatalysis has experienced an incredible development since the
beginning of this century. The expansion of the field has led to a large number of efficient …

New developments of the principle of vinylogy as applied to π-extended enolate-type donor systems

C Curti, L Battistini, A Sartori, F Zanardi - Chemical reviews, 2020 - ACS Publications
The principle of vinylogy states that the electronic effects of a functional group in a molecule
are possibly transmitted to a distal position through interposed conjugated multiple bonds …

Advances in Organocatalytic 1, 6‐Addition Reactions: Enantioselective Construction of Remote Stereogenic Centers

P Chauhan, U Kaya, D Enders - Advanced Synthesis & …, 2017 - Wiley Online Library
Abstract Due to the competing 1, 4‐addition reactions and the distance from the chirality
information, the construction of a remote stereogenic center via 1, 6‐addition reactions is …

Asymmetric cycloaddition reactions catalysed by diarylprolinol silyl ethers

L Klier, F Tur, PH Poulsen, KA Jørgensen - Chemical Society Reviews, 2017 - pubs.rsc.org
Cycloaddition reactions are among the most important tools for the construction of cyclic
compounds in organic synthesis, since these reactions are vital to access natural products …

Catalytic Asymmetric 1,6‐Conjugate Addition of para‐Quinone Methides: Formation of All‐Carbon Quaternary Stereocenters

Z Wang, YF Wong, J Sun - Angewandte Chemie, 2015 - Wiley Online Library
Described herein is a general and mild catalytic asymmetric 1, 6‐conjugate addition of para‐
quinone methides (p‐QMs), a class of challenging reactions with previous limited success …

A new organocatalytic concept for asymmetric α-alkylation of aldehydes

L Caruana, F Kniep, TK Johansen… - Journal of the …, 2014 - ACS Publications
The organocatalytic asymmetric α-alkylation of aldehydes by 1, 6-conjugated addition of
enamines to p-quinone methides is described. Employing a newly developed class of chiral …

Asymmetric Organocatalytic Synthesis of 3-Diarylmethine-Substituted Oxindoles Bearing a Quaternary Stereocenter via 1,6-Conjugate Addition to para-Quinone …

K Zhao, Y Zhi, A Wang, D Enders - ACS Catalysis, 2016 - ACS Publications
A highly stereoselective organocatalytic 1, 6-conjugate addition of 3-substituted oxindoles to
para-quinone methides to construct all-carbon quaternary stereocenters is described. In the …

Azlactone reaction developments

PP de Castro, AG Carpanez… - Chemistry–A European …, 2016 - Wiley Online Library
Azlactones (also known as oxazolones) are heterocycles usually employed in the
stereoselective synthesis of α, α‐amino acids, heterocycles and natural products. The …