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Synthesis of Axially Chiral <i>N</i>-Arylpyrroles through the Enantioselective Annulation of Yne-Allylic Esters with a Cooperative Copper-Squaramide Catalysis

Maoyan Liao, Jixing Li, Haihui Zhu, Zhengyu Han, Yuzhe Zhang, Jianwei Sun, Hai Huang

2025Organic Letters12 citationsDOI

Abstract

We present a strategy involving central-to-axial chirality conversion for the construction of axially chiral N -arylpyrroles via a cooperative copper-squaramide-catalyzed remote propargylic amination/ring closure/rearomatization cascade from yne-allylic esters. The reaction exhibits excellent chemical efficiency and enantioselectivity, involving good central-to-axial chirality conversion. The use of squaramide as cocatalyst is crucial for the success.

Topics & Concepts

SquaramideChemistryEnantioselective synthesisAnnulationAllylic rearrangementCatalysisCopperCombinatorial chemistryStereochemistryMedicinal chemistryOrganic chemistryOrganocatalysisAxial and Atropisomeric Chirality SynthesisMolecular spectroscopy and chiralityAsymmetric Synthesis and Catalysis
Synthesis of Axially Chiral <i>N</i>-Arylpyrroles through the Enantioselective Annulation of Yne-Allylic Esters with a Cooperative Copper-Squaramide Catalysis | Litcius