New development in the enantioselective synthesis of spiro compounds

A Ding, M Meazza, H Guo, JW Yang… - Chemical Society Reviews, 2018 - pubs.rsc.org
The enantioselective synthesis of spirocycles has long been pursued by organic chemists.
Despite their unique 3D properties and presence in several natural products, the difficulty in …

Recent developments in next generation (S)-proline-derived chiral organocatalysts

E Juaristi - Tetrahedron, 2021 - Elsevier
In the area of asymmetric organocatalysis, significant effort has been dedicated during the
last decade to improve the performance of emblematic catalysts such as proline, as well as …

Catalytic enantioselective construction of spiro quaternary carbon stereocenters

PW Xu, JS Yu, C Chen, ZY Cao, F Zhou, J Zhou - ACS Catalysis, 2019 - ACS Publications
The catalytic enantioselective assembly of spirocyclic molecules featuring a spiro quaternary
carbon stereocenter is currently of great interest because such privileged 3D structures are …

N‐Heterocyclic Carbene Catalyzed Cyclocondensation of α, β‐Unsaturated Carboxylic Acids: Enantioselective Synthesis of Pyrrolidinone and Dihydropyridinone …

XY Chen, ZH Gao, CY Song, CL Zhang… - Angewandte Chemie …, 2014 - Wiley Online Library
The catalytic cyclocondensation of in situ activated α, β‐unsaturated carboxylic acids was
developed. N‐heterocyclic carbenes efficiently catalyzed the generation of α, β‐unsaturated …

[HTML][HTML] Non-bonding 1, 5-S⋯ O interactions govern chemo-and enantioselectivity in isothiourea-catalyzed annulations of benzazoles

ERT Robinson, DM Walden, C Fallan… - Chemical …, 2016 - pubs.rsc.org
Isothiourea-catalyzed annulations between 2-acyl benzazoles and α, β-unsaturated acyl
ammonium intermediates are selectively tuned to form either lactam or lactone heterocycles …

[HTML][HTML] α, β-Unsaturated acyl ammonium species as reactive intermediates in organocatalysis: an update

J Bitai, MT Westwood, AD Smith - Organic & Biomolecular Chemistry, 2021 - pubs.rsc.org
α, β-Unsaturated acyl ammonium species are versatile intermediates that have been applied
in a variety of transformations including Michael additions, domino reactions and …

Enantioselective Organocatalytic Four‐Atom Ring Expansion of Cyclobutanones: Synthesis of Benzazocinones

Y Zhou, YL Wei, J Rodriguez… - Angewandte Chemie, 2019 - Wiley Online Library
An enantioselective Michael addition–four‐atom ring expansion cascade reaction involving
cyclobutanones activated by a N‐aryl secondary amide group and ortho‐amino …

Stereoselective domino reactions in the synthesis of spiro compounds

R Westphal, E Venturini Filho, F Medici, M Benaglia… - …, 2022 - thieme-connect.com
This review summarizes the latest developments in asymmetric domino reactions, with the
emphasis on the preparation of spiro compounds. Discussions on the stereoselectivity of the …

Recent synthetic strategies toward the synthesis of spirocyclic compounds comprising six-membered carbocyclic/heterocyclic ring systems

K Babar, AF Zahoor, S Ahmad, R Akhtar - Molecular Diversity, 2021 - Springer
Spirocyclic compounds fascinate the synthetic chemists due to their privileged ring system
and efficacy in drug discovery. Many natural compounds comprise spirocyclic moiety in their …

Phosphine-catalyzed asymmetric (3+ 2) annulations of δ-acetoxy allenoates with β-carbonyl amides: enantioselective synthesis of spirocyclic β-keto γ-lactams

C Ni, J Chen, Y Zhang, Y Hou, D Wang, X Tong… - Organic …, 2017 - ACS Publications
While the phosphine catalysis is a powerful tool for the construction of N-heterocycles, the
phosphine-catalyzed annulations toward lactam motif are still extremely scarce. Here, we …