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  4. Asymmetric Synthesis of Inherently Chiral Tetraoxacalix[2]arene[2]pyridines via S<inf>N</inf>Ar-Based Cross-Cyclotetramerization
 
research article

Asymmetric Synthesis of Inherently Chiral Tetraoxacalix[2]arene[2]pyridines via SNAr-Based Cross-Cyclotetramerization

Ibragimova, Regina
•
Lu, Qiu Lin
•
Wang, Mei Xiang
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2025
Chemistry - An Asian Journal

Potassium phosphate-promoted cross-cyclotetramerization of 2,6-dichloro-3-nitropyridine 1 with resorcinol derivatives 2 gave rise to thermodynamically favored 1,3-alternate tetraoxacalix[2]arene[2]pyridines and kinetically controlled 1,2-alternate isomers. The kinetic product could convert into its 1,3-alternate conformational isomer by a macrocycle to macrocycle conversion pathway. Enantiomerically enriched C2-symmetric inherently chiral tetraoxacalix[2]arene[2]pyridines were synthesized via a Cinchonine-derived chiral phase-transfer catalyst (PTC). This synthesis involved the cross-cyclotetramerization of 1 with 2, featuring a key enantioselective intramolecular aromatic nucleophilic substitution (SNAr) step.

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Type
research article
DOI
10.1002/asia.202401621
Scopus ID

2-s2.0-85217850496

PubMed ID

39888237

Author(s)
Ibragimova, Regina

MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology

Lu, Qiu Lin

MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology

Wang, Mei Xiang

MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology

Zhu, Jieping  

École Polytechnique Fédérale de Lausanne

Tong, Shuo

MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology

Date Issued

2025

Published in
Chemistry - An Asian Journal
Subjects

1,2-alternate conformation

•

asymmetric synthesis

•

chiral phase transfer catalysis

•

inherent chirality

•

one-pot reaction

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSPN  
FunderFunding(s)Grant NumberGrant URL

National Natural Science Foundation of China (NSFC)

Tsinghua University Dushi Program

Available on Infoscience
February 25, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/247197
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