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Lei, Tao ; Graf, Sebastian ; Schöll, Christopher ; Krätzschmar, Felix ; Gregori, Bernhard ; Appleson, Theresa ; Breder, Alexander

Asymmetric Photoaerobic Lactonization and Aza-Wacker Cyclization of Alkenes Enabled by Ternary Selenium–Sulfur Multicatalysis

Lei, Tao, Graf, Sebastian, Schöll, Christopher, Krätzschmar, Felix, Gregori, Bernhard, Appleson, Theresa and Breder, Alexander (2023) Asymmetric Photoaerobic Lactonization and Aza-Wacker Cyclization of Alkenes Enabled by Ternary Selenium–Sulfur Multicatalysis. ACS Catalysis 13 (24), pp. 16240-16248.

Date of publication of this fulltext: 23 Feb 2024 15:37
Article
DOI to cite this document: 10.5283/epub.55588


Abstract

An adaptable, sulfur-accelerated photoaerobic selenium-pi-acid ternary catalyst system for the enantioselective allylic redox functionalization of simple, nondirecting alkenes is reported. In contrast to related photoredox catalytic methods, which largely depend on olefinic substrates with heteroatomic directing groups to unfold high degrees of stereoinduction, the current protocol relies on ...

An adaptable, sulfur-accelerated photoaerobic selenium-pi-acid ternary catalyst system for the enantioselective allylic redox functionalization of simple, nondirecting alkenes is reported. In contrast to related photoredox catalytic methods, which largely depend on olefinic substrates with heteroatomic directing groups to unfold high degrees of stereoinduction, the current protocol relies on chiral, spirocyclic selenium-pi-acids that covalently bind to the alkene moiety. The performance of this ternary catalytic method is demonstrated in the asymmetric, photoaerobic lactonization and cycloamination of enoic acids and unsaturated sulfonamides, respectively, leading to an averaged enantiomeric ratio (er) of 92:8. Notably, this protocol provides for the first time an asymmetric, catalytic entryway to pharmaceutically relevant 3-pyrroline motifs, which was used as a platform to access a 3,4-dihydroxyproline derivative in only seven steps with a 92:8 er.



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Details

Item typeArticle
Journal or Publication TitleACS Catalysis
Publisher:AMER CHEMICAL SOC
Place of Publication:WASHINGTON
Volume:13
Number of Issue or Book Chapter:24
Page Range:pp. 16240-16248
Date2023
InstitutionsChemistry and Pharmacy > Institut für Organische Chemie
Projects
Funded by: Europäische Kommission (EU) (803426)
Identification Number
ValueType
10.1021/acscatal.3c04443DOI
KeywordsENANTIOSELECTIVE SYNTHESIS; PHOTOREDOX CATALYSIS; AMINO-ACID; ABSOLUTE-CONFIGURATION; PHOSPHORUS LIGANDS; DUAL-CATALYSIS; HECK REACTION; OXYGEN; ELECTROPHILES; ALKYLATION; enantioselectivity; photoredoxcatalysis; chiralselenium-pi-acids; alkenolides; 3-pyrrolines; 1,1 '-spirobiindane
Dewey Decimal Classification500 Science > 540 Chemistry & allied sciences
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgYes
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-555889
Item ID55588

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