Synthesis of 2,3-Dialkylated Tartaric Acid Esters Via Visible Light Photoredox-Catalyzed Reductive Dimerization of α-Ketoesters
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A mild transition-metal-free protocol to prepare 2,3-dialkylated tartaric acid esters has been developed by taking advantage of a visible light photoredox-catalyzed reductive dimerization of α-ketoesters with a combination of an organic dye photocatalyst and a Hantzsch-type 1,4-dihydropyridine hydrogen donor. A broad range of functional groups including cyclopropane, alkene, alkyne, 4-methoxybenzyl ether, acetal, silyl ether, carbamate, cyclic ether, cyclic thioether, bromoalkane, and -alkoxyphthalimide are well-compatible. By employing the visible light photoredox-catalyzed reductive coupling and the subsequent optical resolution, both enantioenriched diastereomers of 2,3-dialkylated tartaric acid could be acquired conveniently.
Yasui M, Hanaya K, Sugai T, Higashibayashi S RSC Adv. 2022; 11(40):24652-24655.
PMID: 35481014 PMC: 9036917. DOI: 10.1039/d1ra04443e.
Murray P, Cox J, Chiappini N, Roos C, McLoughlin E, Hejna B Chem Rev. 2021; 122(2):2017-2291.
PMID: 34813277 PMC: 8796287. DOI: 10.1021/acs.chemrev.1c00374.
Visible-light photoredox-catalyzed umpolung carboxylation of carbonyl compounds with CO.
Cao G, Hu X, Liao L, Yan S, Song L, Chruma J Nat Commun. 2021; 12(1):3306.
PMID: 34083530 PMC: 8175691. DOI: 10.1038/s41467-021-23447-8.
Cross-Selective Aza-Pinacol Coupling via Atom Transfer Catalysis.
Rafferty S, Rutherford J, Zhang L, Wang L, Nagib D J Am Chem Soc. 2021; 143(15):5622-5628.
PMID: 33830738 PMC: 8588569. DOI: 10.1021/jacs.1c00886.
Zaghouani M, Bogeholz L, Mercier E, Wintermeyer W, Roche S Tetrahedron. 2019; 75(24):3216-3230.
PMID: 31555018 PMC: 6759494. DOI: 10.1016/j.tet.2019.03.037.